RT Journal Article SR Electronic T1 Andropause, testosterone therapy, and quality of life in aging men JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 880 OP 882 VO 67 IS 12 A2 William S. Wilke A1 John E. Morley YR 2000 UL http://www.ccjm.org/content/67/12/880.abstract AB Testosterone therapy can improve quality of life in aging men because aging is accompanied by declining testosterone levels that may contribute to decreases in muscle mass, bone density, libido, stamina, and cognition. Hypogonadal men can be identified by a test for bioavailable testosterone or by a free testosterone assay that uses dialysis or ultracentrifugation methods.