Razum Oliver, Bozorgmehr Kayvan
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. 2015 Jul;60(5):515-6. doi: 10.1007/s00038-015-0689-4.