Testosterone therapy in men with androgen deficiency syndromes: an Endocrine Society clinical practice guideline - Bhasin, S; Cunningham, G R; Hayes, F J; Matsumoto, A M; Snyder, P J; Swerdloff, R S; Montori, V MTask Force, Endocrine Society (J Clin Endocrinol Metab, 2010)