1. Laboratory of Reproductive Biology, Scientific Unit, Horsens Hospital, Horsens; and Fertility Clinic, Odense University Hospital; Odense; Denmark
2. Institute of Biomedicine; Aarhus University; Aarhus; Denmark
3. Department of Clinical Biochemistry; Vejle Hospital; Vejle; Denmark
4. Sexological Clinic; Faculty of Medicine; Aalborg University; Aalborg; Denmark