title: Erratum to: Revision surgery after third generation autologous chondrocyte implantation in the knee.
authors.affiliation: Department of Orthopaedic Surgery, Physical Medicine and Rehabilitation, University Hospital of Munich (LMU), Munich, Germany, thomas.niethammer@med.uni-muenchen.de.
authors.forename: Thomas R
authors.initials: TR
authors.lastname: Niethammer
authors.forename: Siegfried
authors.initials: S
authors.lastname: Valentin
authors.forename: Andreas
authors.initials: A
authors.lastname: Ficklscherer
authors.forename: Mehmet F
authors.initials: MF
authors.lastname: Gülecyüz
authors.forename: Matthias F
authors.initials: MF
authors.lastname: Pietschmann
authors.forename: Peter E
authors.initials: PE
authors.lastname: Müller