Xianyong Yin, 1,2,3,4,5,6 Kwangwoo Kim , 7 Hiroyuki Suetsugu, 8,9,10 So-Young Bang, 11,12 Leilei Wen, 1,2 Masaru Koido, 9,13 Eunji Ha, 7 Lu Liu, 1,2 Yuma Sakamoto, 8,14 Sungsin Jo, 12 Rui-Xue Leng , 15 Nao Otomo, 8,9,16 Young-Chang Kwon, 12 Yujun Sheng, 1,2 Nobuhiko Sugano , 17 Mi Yeong Hwang, 18 Weiran Li, 1,2 Masaya Mukai, 19 Kyungheon Yoon, 18 Minglong Cai, 1,2 Kazuyoshi Ishigaki, 9,20,21,22 Won Tae Chung, 23 He Huang, 1,2 Daisuke Takahashi, 24 Shin-Seok Lee, 25 Mengwei Wang, 1,2 Kohei Karino, 26 Seung-Cheol Shim, 27 Xiaodong Zheng, 1,2 Tomoya Miyamura, 28 Young Mo Kang, 29 Dongqing Ye , 15 Junichi Nakamura , 30 Chang-Hee Suh, 31 Yuanjia Tang, 32 Goro Motomura, 10 Yong-Beom Park, 33 Huihua Ding , 32 Takeshi Kuroda, 34 Jung-Yoon Choe, 35 Chengxu Li, 4 Hiroaki Niiro, 36 Youngho Park, 12 Changbing Shen, 37,38 Takeshi Miyamoto, 39 Ga-Young Ahn, 11 Wenmin Fei, 4 Tsutomu Takeuchi , 40 Jung-Min Shin, 11 Keke Li, 4 Yasushi Kawaguchi, 41 Yeon-Kyung Lee, 11 Yong-Fei Wang , 42 Koichi Amano, 43 Dae Jin Park, 11 Wanling Yang , 42 Yoshifumi Tada, 44 Yu Lung Lau, 42 Ken Yamaji, 45 Zhengwei Zhu, 1,2 Masato Shimizu, 46 Takashi Atsumi, 47 Akari Suzuki, 48 Takayuki Sumida, 49 Yukinori Okada , 50,51,52 Koichi Matsuda, 53,54 Keitaro Matsuo, 55,56 Yuta Kochi , 57 Japanese Research Committee on Idiopathic Osteonecrosis of the Femoral Head, Kazuhiko Yamamoto , 48 Koichiro Ohmura, 58 Tae-Hwan Kim , 11,12 Sen Yang, 1,2 Takuaki Yamamoto, 59 Bong-Jo Kim, 18 Nan Shen , 32,60,61 Shiro Ikegawa, 8 Hye-Soon Lee, 11,12 Xuejun Zhang, 1,2,62 Chikashi Terao , 9,63,64 Yong Cui, 4 Sang-Cheol Bae 11,12