Jan Vandenbroucke is a Belgian epidemiologist and physician known for his work in clinical epidemiology. He was a Professor of Clinical Epidemiology at Leiden University Medical Centre, the Netherlands (1986-2015). He has been mainly involved in observational studies; his main interest is the application of epidemiologic methods to problems of aetiology and pathogenesis that are investigated in academic medical centres. In 2002-2003 he held a sabbatical at Oxford University, UK. He was appointed as an Academy Professor by the Royal Netherlands Academy of Arts and Sciences (2006-2015) and a Professor of Clinical Epidemiology at Aarhus University, Denmark, in 2014. He serves on the international advisory board of The Lancet, and was a co-author of the Strengthening the Reporting of Observational Studies in Epidemiology (STROBE) guidelines. He was appointed as an Honorary Professor at the London School of Hygiene and Tropical Medicine (LSHTM) in 2015.