1. Institute of Epidemiology and Social Medicine, Ernst Moritz Arndt University, Greifswald, Germany.
2. Institute of Clinical Chemistry and Laboratory Medicine, Ernst Moritz Arndt University, Greifswald, Germany.
3. Institute of Hygiene and Environmental Medicine, Ernst Moritz Arndt University, Greifswald, Germany.
4. Institute for Community Medicine, Ernst Moritz Arndt University, Greifswald, Germany.
5. Department of Radiology and Nuclear Medicine, Ernst Moritz Arndt University, Greifswald, Germany.