Registers of the Swedish total population and their use in medical research

External review and validation of the Swedish national inpatient register

Jonas F. Ludvigsson, Eva Andersson, Anders Ekbom et al. · BMC Public Health · 2011 · 5.1K citations · Full text

Health Professions, Psychiatry, Clinical Medicine +9

Environmental and Heritable Factors in the Causation of Cancer — Analyses of Cohorts of Twins from Sweden, Denmark, and Finland

Paul Lichtenstein, Niels V. Holm, Pia K. Verkasalo et al. · New England Journal of Medicine · 2000 · 4.1K citations

Life Sciences, Genetics, Oncology +17

Symptomatic Gastroesophageal Reflux as a Risk Factor for Esophageal Adenocarcinoma

Jesper Lagergren, Reinhold Bergström, Anders Lindgren et al. · New England Journal of Medicine · 1999 · 3K citations

Medicine, Clinical Sciences, Oncology +15

The Swedish personal identity number: possibilities and pitfalls in healthcare and medical research

Jonas F. Ludvigsson, P Otterblad-Olausson, Birgitta U. Pettersson et al. · European Journal of Epidemiology · 2009 · 2.4K citations · Full text

Health Professions, Health Systems, Electronic Health Records +11

Clinical Epidemiology: The Essentials.

Annals of Internal Medicine · 1991 · 1.9K citations

Medicine, Medical Education, Clinical Epidemiology +10