ISA, ISSAM, EAU, EAA and ASA recommendations: investigation, treatment and monitoring of late-onset hypogonadism in males - Wang, C; Nieschlag, E; Swerdloff, R S; Behre, H; Hellstrom, W J; Gooren, L J; Kaufman, J M; Legros, J J; Lunenfield, B; Morales, A; Morley, J E; Schulman, C; Thompson, I M; Weidner, W; Wu, F C (Aging Male, 2009)