1. Center for Health Outcomes Research; United BioSource Corporation; Bethesda MD USA
2. Division of Urology; University of Pennsylvania School of Medicine; Hospital of the University of Pennsylvania; Philadelphia PA USA
3. Department of Policy Analysis and Management; Cornell University; Ithaca NY USA
4. Pfizer France; Paris France
5. Pfizer Inc; New York NY USA
6. Department of Obstetrics and Gynecology; Sahlgrenska Academy at Gothenburg University; Gothenburg Sweden