| External review and validation of the Swedish national inpatient register JF Ludvigsson, E Andersson, A Ekbom, M Feychting, JL Kim, ... BMC public health 11, 1-16, 2011 | 5143 | 2011 |
| Systematic review of COVID‐19 in children shows milder cases and a better prognosis than adults JF Ludvigsson Acta paediatrica 109 (6), 1088-1095, 2020 | 3052 | 2020 |
| The Swedish personal identity number: possibilities and pitfalls in healthcare and medical research JF Ludvigsson, P Otterblad-Olausson, BU Pettersson, A Ekbom European journal of epidemiology 24, 659-667, 2009 | 2498 | 2009 |
| The Oslo definitions for coeliac disease and related terms JF Ludvigsson, DA Leffler, JC Bai, F Biagi, A Fasano, PHR Green, ... Gut 62 (1), 43-52, 2013 | 2264 | 2013 |
| Registers of the Swedish total population and their use in medical research JF Ludvigsson, C Almqvist, AKE Bonamy, R Ljung, K Michaëlsson, ... European journal of epidemiology 31, 125-136, 2016 | 1576 | 2016 |
| Diagnosis and management of adult coeliac disease: guidelines from the British Society of Gastroenterology JF Ludvigsson, JC Bai, F Biagi, TR Card, C Ciacci, PJ Ciclitira, ... Gut 63 (8), 1210-1228, 2014 | 1323 | 2014 |
| The Swedish cause of death register HL Brooke, M Talbäck, J Hörnblad, LA Johansson, JF Ludvigsson, ... European journal of epidemiology 32, 765-773, 2017 | 1299 | 2017 |
| The prevalence of celiac disease in the United States A Rubio-Tapia, JF Ludvigsson, TL Brantner, JA Murray, JE Everhart Official journal of the American College of Gastroenterology| ACG 107 (10 …, 2012 | 974 | 2012 |
| The longitudinal integrated database for health insurance and labour market studies (LISA) and its use in medical research JF Ludvigsson, P Svedberg, O Olén, G Bruze, M Neovius European journal of epidemiology 34, 423-437, 2019 | 926 | 2019 |
| Mortality in biopsy-confirmed nonalcoholic fatty liver disease: results from a nationwide cohort TG Simon, B Roelstraete, H Khalili, H Hagström, JF Ludvigsson Gut 70 (7), 1375-1382, 2021 | 503 | 2021 |
| Severe spruelike enteropathy associated with olmesartan A Rubio-Tapia, ML Herman, JF Ludvigsson, DG Kelly, TF Mangan, TT Wu, ... Mayo clinic proceedings 87 (8), 732-738, 2012 | 495 | 2012 |
| Small-intestinal histopathology and mortality risk in celiac disease JF Ludvigsson, SM Montgomery, A Ekbom, L Brandt, F Granath Jama 302 (11), 1171-1178, 2009 | 488 | 2009 |
| Vagotomy and Parkinson disease: A Swedish register–based matched-cohort study B Liu, F Fang, NL Pedersen, A Tillander, JF Ludvigsson, A Ekbom, ... Neurology 88 (21), 1996-2002, 2017 | 460 | 2017 |
| Review of 103 S wedish H ealthcare Q uality R egistries L Emilsson, B Lindahl, M Köster, M Lambe, JF Ludvigsson Journal of internal medicine 277 (1), 94-136, 2015 | 443 | 2015 |
| Ethical aspects of registry-based research in the Nordic countries JF Ludvigsson, SE Håberg, GP Knudsen, P Lafolie, H Zoega, C Sarkkola, ... Clinical epidemiology, 491-508, 2015 | 438 | 2015 |
| Colorectal cancer in ulcerative colitis: a Scandinavian population-based cohort study O Olén, R Erichsen, MC Sachs, L Pedersen, J Halfvarson, J Askling, ... The Lancet 395 (10218), 123-131, 2020 | 436 | 2020 |
| Incidence of celiac disease is increasing over time: a systematic review and meta-analysis JA King, J Jeong, FE Underwood, J Quan, N Panaccione, JW Windsor, ... Official journal of the American College of Gastroenterology| ACG 115 (4 …, 2020 | 433 | 2020 |
| Case report and systematic review suggest that children may experience similar long‐term effects to adults after clinical COVID‐19 JF Ludvigsson Acta Paediatrica 110 (3), 914-921, 2021 | 424 | 2021 |
| Celiac disease and non-celiac gluten sensitivity B Lebwohl, JF Ludvigsson, PHR Green Bmj 351, 2015 | 405 | 2015 |
| Intrahepatic cholestasis of pregnancy and associated adverse pregnancy and fetal outcomes: a 12‐year population‐based cohort study E Wikström Shemer, HU Marschall, JF Ludvigsson, O Stephansson BJOG: An International Journal of Obstetrics & Gynaecology 120 (6), 717-723, 2013 | 385 | 2013 |