Cinobufotalin prevents bone loss induced by ovariectomy in mice through the BMPs/SMAD and Wnt/β‐catenin signaling pathways oleh Da‐zhuang Lu, Li‐jun Zeng, Yang Li, Ran‐li Gu, Meng‐long Hu, Ping Zhang, Peng Yu, Xiao Zhang, Zheng‐wei Xie, Hao Liu, Yong‐sheng Zhou