Does Zoledronate Prevent Femoral Head Collapse from Osteonecrosis? A Prospective, Randomized, Open-Label, Multicenter Study. - Lee, Young-Kyun; Ha, Yong-Chan; Cho, Yoon Je; Suh, Kuen Tak; Kim, Shin-Yoon; Won, Ye-Yeon; Min, Byung-Woo; Yoon, Taek Rim; Kim, Hee Joong; Koo, Kyung-Hoi (Journal of Bone & Joint Surgery, American Volume, 2015)