Olsen Morten, Schmidt Morten, Lash Timothy Lee, Sørensen Keld, Pedersen Lars, Sørensen Henrik Toft
Department of Clinical Epidemiology, Aarhus University Hospital, Aarhus, Denmark.
Department of Epidemiology, Rollins School of Public Health, Emory University, Atlanta, Georgia.
Am J Epidemiol. 2014 Jul 1;180(1):120-3. doi: 10.1093/aje/kwu144. Epub 2014 May 28.