TY - RPRT TI - Age-related changes in male gonadal function. Implications for therapy. AU - D Maas AU - A Jochen AU - B Lalande PY - 1997 DO - 10.2165/00002512-199711010-00005 UR - https://pubmed.ncbi.nlm.nih.gov/9237040/ ID - 9237040 ER -