Ysgol Gwyddorau Iechyd

  1. Erthygl › Ymchwil › Adolygwyd gan gymheiriaid
  2. Cyhoeddwyd

    Ideal, expected and perceived descriptive norm drunkenness in UK nightlife environments: a cross-sectional study

    Hughes, K., Quigg, Z., Ford, K. & Bellis, M., 27 Ebr 2019, Yn: BMC Public Health. 19, 1, 7 t., 442.

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  3. Cyhoeddwyd

    Identification of a class of human cancer germline genes with transcriptional silencing refractory to the hypomethylating drug 5-aza-2'-deoxycytidine

    Almatrafi, A., Feichtinger, J., Vernon, E. G., Escobar, N. G., Wakeman, J. A., Larcombe, L. D. & McFarlane, R. J., 10 Tach 2014, Yn: Oncoscience. 1, 11, t. 745-750 6 t.

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  4. Cyhoeddwyd

    Identifying facilitators and barriers for adolescents participating in a school-based HIIT intervention: the eXercise for asthma with commando Joe’s® (X4ACJ) programme

    Sharp, C. A., McNarry, M. A., Eddolls, W. T. B., Koorts, H., Winn, C. O. N. & Mackintosh, K. A., 2020, Yn: BMC Public Health. 20, 1, 609.

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  5. Cyhoeddwyd

    Identifying integrated health services and social care research priorities in kidney disease in Wales: research prioritisation exercise

    McLaughlin, L., Spence, S. & Noyes, J., 1 Hyd 2020, Yn: BMJ Open. 10 , 9, 12 t., e036872.

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  6. Cyhoeddwyd

    Identifying the patient at risk of deterioration, intensive care unit admission, or cardiac arrest: Stop predicting, start preventing

    Soar, J. & Subbe, C. P., 1 Gorff 2012, Yn: Critical Care Medicine. 40, 7, t. 2243-2244

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  7. Cyhoeddwyd

    Impact of COVID-19 pandemic on incidence of long-term conditions in Wales: a population data linkage study using primary and secondary care health records

    Qi, C., Osborne, T., Bailey, R., Cooper, A., Hollinghurst, J., Akbari, A., Crowder, R., Peters, H., Law, R-J., Lewis, R., Smith, D., Walker, M., Edwards, A. & Lyons, R., Mai 2023, Yn: British Journal of General Practice. 73, 730, t. e332-e339

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  8. Cyhoeddwyd

    Impact of Untimely Access to Formal Care on Costs and Quality of Life in Community Dwelling People with Dementia

    Janssen, N., Handels, R. L., Skoldunger, A., Woods, B., Jelley, H., Edwards, R. T., Orrell, M., Selbaek, G., Rosvik, J., Goncalves-Pereira, M., Marques, M. J., Zanetti, O., Portolani, E., Irving, K., Hopper, L., Meyer, G., Bieber, A., Stephan, A., Kerpershoek, L., Wolfs, C. A. G., de Vugt, M. E., Verhey, F. R. J., Wimo, A. & Consortium Actifcare, 23 Tach 2018, Yn: Journal of Alzheimer's Disease. 66, 3, t. 1165-1174

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  9. Cyhoeddwyd

    Impact of assessment frequency of patient-reported outcomes: an observational study using an eHealth platform in cancer patients

    Innominato, P. F., Komarzynski, S., Dallmann, R., Wreglesworth, N. I., Bouchahda, M., Karaboué, A., Ulusakarya, A., Subbe, C. P., Spiegel, D. & Lévi, F. A., Tach 2021, Yn: Supportive care in cancer. 29, 11, t. 6167–6170

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  10. Cyhoeddwyd

    Impact of changing provider remuneration on NHS general dental practitioner services in Northern Ireland: a mixed-methods study

    Brocklehurst, P., Tickle, M., Birch, S., McDonald, R., Walsh, T., Lloyd Goodwin, T., Hill, H., Howarth, E., Donaldson, M., O’Carolan, D., Fitzpatrick, S., McCrory, G. & Slee, C., 31 Ion 2020, Yn: Health Services and Delivery Research (HS&DR). 8, 6

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  11. Cyhoeddwyd

    Impact of electronic health records on predefined safety outcomes in patients admitted to hospital: a scoping review

    Subbe, C. P., Tellier, G. & Barach, P., 13 Ion 2021, Yn: BMJ Open. 11, 1, e047446.

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  12. Cyhoeddwyd

    Impact of relaxing Covid-19 social distancing measures on rural North Wales: a simulation analysis

    Hughes, R. P. & Hughes, D., 14 Rhag 2020, Yn: Frontiers in Public Health. 8, 562473.

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  13. Cyhoeddwyd

    Impact of the European Working Time Directive on an epistaxis service.

    Kamel, U., Kamel, U. F. & Chatzoudiz, D., 1 Gorff 2007, Yn: Clinical Governance Bulletin. 6, 5-6, t. 27-28

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  14. Cyhoeddwyd

    Implementation processes in a cognitive rehabilitation intervention for people with dementia: a complexity-informed qualitative analysis.

    Morgan-Trimmer, S., Kudlicka, A., Warmoth, K., Leroi, I., Oyebode, J., Pool, J., Woods, B. & Clare, L., 2021, Yn: BMJ Open. 11, 10, e051255.

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  15. Cyhoeddwyd

    Implementing Digital Life Story Work for People with Dementia: Relevance of Context to User Experience

    O Philbin, L., Woods, B. & Windle, G., 10 Maw 2020, Yn: International Journal of Reminiscence and Life Review. 7, 1, t. 22-32

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  16. Cyhoeddwyd

    Implementing a home-based personalised cognitive rehabilitation intervention for people with mild-to-moderate dementia: GREAT into Practice.

    Clare, L., Kudlicka, A., Collins, R., Evans, S., Pool, J., Henderson, C., Knapp, M., Litherland, R., Oyebode, J. & Woods, B., 13 Chwef 2023, Yn: BMC Geriatrics. 23, 93.

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  17. Cyhoeddwyd

    Implementing market-based reforms in the English NHS: Bureaucratic coping strategies and social embeddedness

    Jones, L., Exworthy, M. & Frosini, F., Meh 2013, Yn: Health Policy. 111, 1, t. 52-59

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  18. Cyhoeddwyd

    Improved limb salvage for patients with vascular disease and tissue loss associated with new model of provision targeted at the diabetic foot

    Williams, D., Powell-Chandler, A., Qureshi, Q., Zaidi, A. & Whitaker, C., Ion 2018, Yn: Diabetes Research and Clinical Practice. 135, t. 50-57

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  19. Cyhoeddwyd

    Improving Communication and Reducing Clinical and Medico Legal Risk.

    Brigden, D. N., Thomas, M. & Bridgen, D. N., 13 Ion 2005, Yn: Hospital Doctor.

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  20. Cyhoeddwyd

    Improving quality of life through the routine use of the patient concerns inventory for head and neck cancer patients: baseline results in a cluster preference randomised controlled trial

    Rogers, S. N., Allmark, C., Bekiroglu, F., Edwards, R. T., Fabbroni, G., Flavel, R., Highet, V., Ho, M. W. S., Humphris, G. M., Jones, T. M., Khattak, O., Lancaster, J., Loh, C., Lowe, D., Lowies, C., Macareavy, D., Moor, J., Ong, T. K., Prasai, A., Roland, N., Semple, C., Spencer, L. H., Tandon, S., Thomas, S. J., Schache, A., Shaw, R. J. & Kanatas, A., Rhag 2020, Yn: European Archives of Oto-Rhino-Laryngology. 277, 12, t. 3435-3447 13 t.

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  21. Cyhoeddwyd

    Improving reporting of meta-ethnography: The eMERGe reporting guidance

    France, E. F., Cunningham, M., Ring, N., Uny, I., Duncan, E. A. S., Jepson, R. G., Maxwell, M., Roberts, R. J., Turley, R. L., Booth, A., Britten, N., Flemming, K., Gallagher, I., Garside, R., Hannes, K., Lewin, S., Noblit, G. W., Pope, C., Thomas, J., Vanstone, M., Higginbottom, G. M. A. & Noyes, J., Maw 2019, Yn: Psycho-Oncology. 28, 3, t. 447-458 12 t.

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  22. Cyhoeddwyd

    Improving reporting of meta-ethnography: the eMERGe reporting guidance

    France, E. F., Cunningham, M., Ring, N., Uny, I., Duncan, E. A. S., Jepson, R. G., Maxwell, M., Roberts, R. J., Turley, R. L., Booth, A., Britten, N., Flemming, K., Gallagher, I., Garside, R., Hannes, K., Lewin, S., Noblit, G. W., Pope, C., Thomas, J., Vanstone, M., Higginbottom, G. M. A. & Noyes, J., 31 Ion 2019, Yn: BMC Medical Research Methodology. 19, 1, t. 25

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  23. Cyhoeddwyd

    Improving skills and care standards in the support workforce for older people: a realist synthesis of workforce development interventions

    Williams, L., Rycroft-Malone, J., Burton, C. R., Edwards, S., Fisher, D., Hall, B., McCormack, B., Nutley, S. M., Seddon, D. & Williams, R., 31 Gorff 2016, Yn: BMJ Open. 6, 8

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  24. Cyhoeddwyd

    Improving the oral health of older people in care homes (TOPIC): a protocol for a feasibility study

    Tsakos, G., Brocklehurst, P., Watson, S., Verey, A., Goulden, N., Jenkins, A., Pye, K., Wassall, R., Sherriff, A., Heilmann, A., O'Neill, C., Smith, C., Langley, J., Venturelli, R., Cairns, P., Lievesley, N., Watt, R., Kee, F. & McKenna, G., 2 Gorff 2021, Yn: Pilot and Feasibility Studies. 7, 1, 138.

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  25. Cyhoeddwyd

    In vivo validation of a novel semi-automated method for border detection in intravascular ultrasound images

    Bourantas, C. V., Plissiti, M. E., Fotiadis, D. I., Protopappas, V. C., Mpozios, G. V., Katsouras, C. S., Kourtis, I. C., Rees, M. R. & Michalis, L. K., 1 Chwef 2005, Yn: British Journal of Radiology. 78, 926, t. 122-129

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  26. Cyhoeddwyd

    Including a wider range of values in healthcare policy: how can public value evaluation help?

    Jones, L., 30 Tach 2022, Yn: Future Healthcare Journal. 9, 3, t. 222-225 4 t.

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  27. Cyhoeddwyd

    Indications for deciding compression in the treatment of chronic oededma

    Linnett, N. & Jones, J., 2 Ebr 2012, Yn: British Journal of Community Nursing. 17, Supplement 4, t. S11-S15 4 t.

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  28. Cyhoeddwyd

    Individual goal-oriented cognitive rehabilitation to improve everyday functioning for people with early-stage dementia: a multi-centre randomised controlled trial (the GREAT trial)

    Clare, L., Kudlicka, A., Oyebode, J. R., Jones, R. W., Bayer, A., Leroi, I., Kopelman, M., James, I., Culverwell, A., Pool, J., Brand, A., Henderson, C., Hoare, Z., Knapp, M. & Woods, R., Mai 2019, Yn: International Journal of Geriatric Psychiatry. 34, 5, t. 709-721 13 t.

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  29. Cyhoeddwyd

    Induction and analysis of synchronous meiotic yeast cultures

    Cha, R. S., Borner, G. V. & Cha, R., 1 Hyd 2015, Yn: Cold Spring Harbor Protocols. 2015, 10, t. 908-913

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  30. Cyhoeddwyd

    Influence of diabetes and lower limb arterial disease on cutaneous foot perfusion.

    Williams, D. T., Price, P. & Harding, K. G., 1 Hyd 2006, Yn: Journal of Vascular Surgery. 44, 4, t. 770-775

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  31. Cyhoeddwyd

    Influence of positive aspects of dementia caregiving on caregivers’ well-being: A systematic review

    Quinn, C. & Toms, G., Hyd 2019, Yn: Gerontologist. 59, 5, t. e584-e596

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  32. Cyhoeddwyd

    Informal caregiver motivations, values, challenges and gains: A photovoice and interpretative phenomenological analysis of interrelationships

    Zarzycki, M., Seddon, D. & Morrison, V., Mai 2023, Yn: Journal of Health Psychology. 28, 6, t. 568–582 15 t.

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  33. Cyhoeddwyd

    Inhaled Corticosteroids Alone and in Combination With Long-Acting beta(2) Receptor Agonists to Treat Reduced Lung Function in Preterm-Born Children A Randomized Clinical Trial: A Randomized Clinical Trial

    Goulden, N., Cousins, M., Hart, K., Jenkins, A., Willetts, G., Yendle, L., Doull, I., Williams, M., Hoare, Z. & Kotecha, S., 1 Chwef 2022, Yn: JAMA Pediatrics. 176, 2, t. 133-141 9 t.

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  34. Cyhoeddwyd

    Insulin-Like Growth Factor Binding Protein 3 Has Opposing Actions on Malignant and Nonmalignant Breast Epithelial Cells that Are Each Reversible and Dependent upon Cholesterol-Stabilized Integrin Receptor Complexes

    Burrows, C., Laurence, JN., Vernon, E., Carter, JV., Clark, M., Mcintosh, J., McCaig, C., Winters, ZE. & Perks, C., Awst 2006, Yn: Endocrinology. 147, 7, t. 3484-500 16 t.

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  35. Cyhoeddwyd

    Integrated nuclear proteomics and transcriptomics identifies S100A4 as a therapeutic target in acute myeloid leukemia

    Alanazi, B., Munje, C. R., Rastogi, N., Williamson, A. J. K., Taylor, S., Hole, P. S., Hodges, M., Doyle, M., Baker, S., Gilkes, A. F., Knapper, S., Pierce, A., Whetton, A. D., Darley, R. L. & Tonks, A., 2020, Yn: Leukemia. 34, 2, t. 427-440 14 t.

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  36. Cyhoeddwyd

    Integration of Pharmacometrics and Pharmacoeconomics to Quantify the Value of Improved Forgiveness to Nonadherence: A Case Study of Novel Xanthine Oxidase Inhibitors for Gout

    Hill McManus, D., Marshall, S., Soto, E. & Hughes, D., Medi 2019, Yn: Clinical Pharmacology and Therapeutics. 106, 3, t. 652-660

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  37. Cyhoeddwyd

    Intergenerational Deliberations for Long Term Sustainability

    Spencer, L., Lynch, M., Thomas, G. & Edwards, R. T., 11 Chwef 2023, Yn: Challenges. 14, 1, 16 t., 11.

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  38. Cyhoeddwyd

    Intersectionality and its relevance for research in dementia care of people with a migration background

    Roes, M., Laporte Uribe, F., Peters-Nehrenheim, V., Smits, C., Johannessen, A., Charlesworth, G., Parveen, S., Mueller, N., Hedd Jones, C., Thyrian, R., Monsees, J. & Tezcan-Güntekin, H., Gorff 2022, Yn: Zeitschrift für Gerontologie und Geriatrie. 55, 4, t. 287-291 5 t.

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  39. Cyhoeddwyd

    Intersektionalität und ihre Bedeutung für die Demenzforschung bei Menschen mit Migrationshintergrund

    Roes, M., Laporte Uribe, F., Peters-Nehrenheim, V., Smits, C., Johannessen, A., Charlesworth, G., Parveen, S., Mueller, N., Jones, C. H., Thyrian, R., Monsees, J. & Tezcan-Güntekin, H., Gorff 2022, Yn: Zeitschrift für Gerontologie und Geriatrie. 55, 4, t. 287-291 5 t.

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  40. Cyhoeddwyd
  41. Cyhoeddwyd

    Interventions targeting the mental health and wellbeing of care-experienced children and young people in higher-income countries: Evidence map and systematic review

    Evans, R., MacDonald, S., Trubey, R., Noyes, J., Robling, M., Willis, S., Boffey, M., Wooders, C., Vinnicombe, S. & Melendez-Torres, G. J., 1 Gorff 2023, Yn: Systematic Reviews. 12, 1, 111.

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  42. Cyhoeddwyd

    Interventions to increase physical activity and reduce sedentary behaviour in severe mental ill health: How effective are they?’- A systematic review

    Peckham, E., Traviss-Turner, G. D., Tew, G. A., Lorimer, B., Bailey, L., Beeken, R. J., Cooper, C., Gascoyne, S., Gilbody, S., Jones, G., Machaczek, K. K., Pickering, K., Traviss-Turner, G. D. & Stubbs, B., Hyd 2023, Yn: Mental Health and Physical Activity. 25, 1, 100547.

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  43. Cyhoeddwyd

    Introducing KiVa school-based antibullying programme to the UK: A preliminary examination of effectiveness and programme cost

    Clarkson, S., Charles, J. M., Saville, C. W. N., Bjornstad, G. J. & Hutchings, J., Awst 2019, Yn: School Psychology International. 40, 4, t. 347-365

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  44. E-gyhoeddi cyn argraffu

    Involving older adults and unpaid carers in the research cycle: reflections on implementing the UK National Standards for Public Involvement into practice

    Jones, C. H., Seddon, D., Algar-Skaife, K., Maddock, C. & Watts-Green, S., 26 Rhag 2023, (E-gyhoeddi cyn argraffu) Yn: Quality in Ageing and Older Adults.

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  45. Cyhoeddwyd

    Is conservative treatment really effective for Legg-Calve-Perthes disease? A critical review of the literature

    Sinigaglia, R., Bundy, A., Okoro, T., Gigante, C. & Turra, S., 1 Tach 2007, Yn: Chirugia Narzadow Ruchu I Orthopedia Polska. 72, 6

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  46. Cyhoeddwyd

    Is increased time to diagnosis and treatment in symptomatic cancer associated with poorer outcomes? Systematic review

    Neal, R. D., Tharmanathan, P., France, B., Din, N. U., Cotton, S., Fallon-Ferguson, J., Hamilton, W., Hendry, A., Hendry, M., Lewis, R., Macleod, U., Mitchell, E. D., Pickett, M., Rai, T., Shaw, K., Stuart, N., Tørring, M. L., Wilkinson, C., Williams, B., Williams, N. & Emery, J., 31 Maw 2015, Yn: British Journal of Cancer. 112 , Suppl 1, t. S92-107

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  47. Cyhoeddwyd

    Is it time to consign ‘anti-public health’ expressions to the dustbin of history?

    Atenstaedt, R., 12 Ebr 2021, Yn: Journal of Public Health. 43, 1, t. e119-e119

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  48. Cyhoeddwyd

    Is parental unemployment associated with increased risk of adverse childhood experiences? A systematic review and meta-analysis

    Judd, N., Hughes, K., Bellis, M., Hardcastle, K. & Amos, R., 29 Tach 2023, Yn: Journal of Public Health. 45, 4, t. 829-839 11 t.

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  49. Cyhoeddwyd

    Is there a role for Natural Desiccated Thyroid in the treatment of levothyroxine unresponsive hypothyroidism? Results from a Consecutive Case Series

    Heald, A., Premawardhana, L., Taylor, P., Okosieme, O., Bangi, T., Devine, H., Livingston, M., Javed, A., Moreno, G. Y. C., Watt, T., Stedman, M. & Hughes, D., 28 Rhag 2021, Yn: International Journal of Clinical Practice. 75, 12, e14967.

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  50. Cyhoeddwyd

    Journal Clubs - A valuable contribution to undergraduate education.

    Thomson, R., Jefferson, H., Farrier, A. & Brigden, D. N., 1 Ion 2007, Yn: Newsletter of the Higher Education Academy Subject Centre for Medicine, Dentistry and Veterinary Medicine. 1, 15

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  51. Cyhoeddwyd

    Keeping the Elderly and Workers Safe in Nursing Homes, during a Pandemic

    Law, J., 26 Awst 2021, Yn: International Journal of Nursing and Health Care Science. 01, 13, 2 t.

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid