TY - RPRT TI - Estrogen replacement improves spatial reference memory and increases hippocampal synaptophysin in aged female mice. AU - K M Frick AU - S M Fernandez AU - S C Bulinski PY - 2002 DO - 10.1016/s0306-4522(02)00377-9 UR - https://pubmed.ncbi.nlm.nih.gov/12421621/ ID - 12421621 ER -