TY - GEN AU - Veldhuis,J D AU - Pincus,S M AU - Keenan,D M TI - Noninvasive in vivo investigative probes of adaptive mechanisms of neuroendocrine regulation: the paradigm of the hypothalamo-pituitary-gonadal axis in the aging male SN - 0391-4097 PY - 2004///0420 KW - Adaptation, Physiological KW - physiology KW - Adult KW - Aged KW - Aging KW - Cell Communication KW - Feedback, Physiological KW - Gonadotropin-Releasing Hormone KW - Humans KW - Hypothalamo-Hypophyseal System KW - Luteinizing Hormone KW - Male KW - Middle Aged KW - Testis N1 - Publication Type: Journal Article; Research Support, U.S. Gov't, Non-P.H.S.; Research Support, U.S. Gov't, P.H.S.; Review ER -