1. National Institute of Public Health; University of Southern Denmark; Copenhagen Denmark
2. Clinical Pharmacology and Pharmacy, Department of Public Health; University of Southern Denmark; Odense C Denmark
3. Department of Clinical Chemistry & Pharmacology; Odense University Hospital; Odense C Denmark
4. Danish Cancer Society Research Center; Danish Cancer Society; Copenhagen Ø Denmark
5. Department of Epidemiology, Gillings School of Global Public Health; University of North Carolina; Chapel Hill North Carolina USA