Razum Oliver, Spallek Jacob
Department of Epidemiology and International Public Health, School of Public Health, Bielefeld University, P.O. Box 10 01 31, 33501, Bielefeld, Germany,
Int J Public Health. 2014 Dec;59(6):893-5. doi: 10.1007/s00038-014-0584-4. Epub 2014 Jul 11.