Characteristics of the patellofemoral joint of patients with DDH and the effects of Bernese periacetabular osteotomy on the patellofemoral joint. - Peng, Jianping; Xiao, Fei; Zhu, Junfeng; Shen, Chao; Li, Yang; Han, Xiuguo; Cui, Yimin; Chen, Xiaodong (BMC Musculoskeletal Disorders, 2022)