TY  - RPRT
TI  - Declining gonadal function in elderly men.
AU  - J M Kaufman
AU  - A Vermeulen
PY  - 1997
DO  - 10.1016/s0950-351x(97)80302-3
UR  - https://pubmed.ncbi.nlm.nih.gov/9403124/
ID  - 9403124
ER  -