1. Andrology Study Program, Faculty of Medicine, Universitas Airlangga, Surabaya, Indonesia
2. Department of Biomedical Sciences, Faculty of Medicine, Universitas Airlangga, Surabaya, Indonesia
3. Department of Medical Biology, Faculty of Medicine, Atma Jaya Catholic University of Indonesia, Jakarta, Indonesia
4. Department of Biomedical Sciences, Faculty of Medicine, Universitas Padjadjaran, Sumedang, Indonesia