Estradiol inhibits osteoblast apoptosis via promotion of autophagy through the ER–ERK–mTOR pathway - Yue-Hua Yang; Ke Chen; Bo Li; Jiang-Wei Chen; Xin-Feng Zheng; Yu-Ren Wang; Sheng-Dan Jiang; Lei-Sheng Jiang (Apoptosis, 2013)