There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.
[1
]
Institute for Community Medicine, SHIP-KEF, University Medicine of Greifswald, Walther-Rathenau
Str 48, 17475 Greifswald, Germany. carsten.schmidt@uni-greifswald.de