1. Center for Andrology, Viet Duc University Hospital, Hanoi, Vietnam
2. University of Medicine and Pharmacy, Vietnam National University, Hanoi, Vietnam
3. Traditional Medicine Hospital, Ministry of Public Security, Hanoi, Vietnam
4. Department of Urology, University of Queensland, Princess Alexandra Hospital, Brisbane, Queensland, Australia
5. Hai Phong University of Medicine and Pharmacy, Hai Phong, Vietnam
6. Vietnam University of Traditional Medicine, Hanoi, Vietnam
7. Guangzhou University of Chinese Medicine, Guangzhou, China
8. Faculty of Traditional Medicine at Phenikaa University, Hanoi, Vietnam