Drynariae Rhizoma promotes osteoblast differentiation and mineralization in MC3 T3-E1 cells through regulation of bone morphogenetic protein-2, alkaline phosphatase, type I collagen and collagenase-1 - Jeong, J C; Lee, J W; Yoon, C H; Kim, H M; Kim, C H (Toxicol In Vitro, 2004)