Investigation, treatment, and monitoring of late-onset hypogonadism in males: ISA, ISSAM, EAU, EAA, and ASA recommendations - Wang, C; Nieschlag, E; Swerdloff, R; Behre, H M; Hellstrom, W J; Gooren, L J; Kaufman, J M; Legros, J J; Lunenfeld, B; Morales, A; Morley, J E; Schulman, C; Thompson, I M; Weidner, W; Wu, F C; International Society of Andrology; International Society for the Study of Aging Male; European Association of Urology; European Academy of Andrology; American Society of Andrology (Eur Urol, 2009)