1. Institute of Epidemiology and Social Medicine, Ernst Moritz Arndt University Greifswald, Germany.
2. Institute fInstitute for Community Medicine, Ernst Moritz Arndt University Greifswald, Germany.
3. Institute of Clinical Chemistry and Laboratory Medicine, Ernst Moritz Arndt University Greifswald, Germany.
4. Medical Department A, Ernst Moritz Arndt University Greifswald, Germany.