Comparison of Interobserver Agreement of Four Classification Systems for Lateral Clavicle Fractures between Two Groups of Surgeons: A Multicenter Study oleh Jian Lin, Wei‐Jin Sun, Jian‐Hai Chen, Jing‐Ming Dong, Ding‐Su Bao, Ling Yan, Wei‐Dong Ni, Ming Xiang, Jian Ding, Ming Cai, Jia‐Xiang Song, Ming‐Gui Mao, Xiao‐Ming Wu