Correction: Pathologically altered articular cartilage attracts intense chondrocyte invasion into the extracellular matrix: in vitro pilot study - Victoria A. Shestakova; Ilya D. Klabukov; Ilya V. Kolobaev; Longfeng Rao; Dmitry A. Atiakshin; Michael A. Ignatyuk; Mikhail E. Krasheninnikov; Bagavdin G. Ahmedov; Sergey A. Ivanov; Peter V. Shegay; Andrey D. Kaprin; Denis S. Baranovskii (Knee Surgery & Related Research)