title: Comments on Grassi et al.: Clinical outcome and complications of a collagen meniscus implant: a systematic review.
authors.affiliation: Orthopedics and Traumatology, Medical Center Haaglanden, The Hague, The Netherlands, rjpvanderwal@hotmail.com.
authors.forename: Robert J P
authors.initials: RJ
authors.lastname: van der Wal
authors.forename: Johan H
authors.initials: JH
authors.lastname: Pot
authors.forename: Ewoud R A
authors.initials: ER
authors.lastname: van Arkel