- Correspondence to Priv Doz Dr Freia De Bock,Mannheim Institute of Public Health, Social and Preventive Medicine, Medical Faculty Mannheim, Heidelberg University, Ludolf-Krehl-Strasse 7-11, Mannheim 68167, Germany;
- Received September 16, 2016
- Revised December 14, 2016
- Accepted December 15, 2016
- First published January 19, 2017.
If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.