1. The Danish Twin Registry, Epidemiology, Institute of
Public Health, University of Southern Denmark, Odense, Denmark, Department of Clinical Biochemistry and Pharmacology
and Department of Clinical Genetics, Odense University Hospital, Odense, Denmark,
kchristensen@health.sdu.dk
2. Institute of Regional Health Services Research, University
of Southern Denmark, Odense, Denmark
3. The Danish Twin Registry, Epidemiology, Institute of
Public Health, University of Southern Denmark, Odense, Denmark, Department of Oncology, Odense University Hospital,
Odense, Denmark
4. The Danish Twin Registry, Epidemiology, Institute of
Public Health, University of Southern Denmark, Odense, Denmark