title: Erratum to: Prediction of osteonecrosis collapse of the femoral head based on the proportion of the proximal sclerotic rim.
authors.affiliation: Department of Orthopaedics, Guang'anmen Hospital, China Academy of Chinese Medical Sciences, Beijing, 100053, China.
authors.forename: Tong
authors.initials: T
authors.lastname: Yu
authors.forename: Limin
authors.initials: L
authors.lastname: Xie
authors.forename: Zhennan
authors.initials: Z
authors.lastname: Zhang
authors.forename: Xun
authors.initials: X
authors.lastname: Ke
authors.forename: Yang
authors.initials: Y
authors.lastname: Liu