1. Bayer PharmaGlobal Medical Affairs AndrologyBerlinGermany and Gulf Medical University School of Medicine, AjmanUAE
2. Private Urology PracticeBremerhavenGermany
3. Department of Epidemiology and StatisticsBoston University School of Public HealthBostonMAUSA
4. Department of Biochemistry and Department of UrologyBoston University School of MedicineBostonMAUSA