1. Department of Genetics and Genomics, Boston University Medical School, E613, 715 Albany Street, Boston, MA 02118, USA.
2. Department of Epidemiology, Harvard School of Public Health, 677 Huntington Avenue, Boston, MA 02115, USA.
3. Institute of Epidemiology, Forschungszentrum fuÌr Umwelt und Gesundheit, D-85764 Neuherberg, Germany.
4. KORA Group, Forschungszentrum fuÌr Umwelt und Gesundheit, D-85764 Neuherberg, Germany.
5. Institute of Human Genetics, Forschungszentrum fuÌr Umwelt und Gesundheit, D-85764 Neuherberg, Germany.