Platelet-rich plasma for the treatment of knee osteoarthritis: an expert opinion and proposal for a novel classification and coding system

Elizaveta Kon, Berardo Di Matteo, Diego Delgado, Brian J. Cole, Andrea Dorotei, Jason L. Dragoo, Giuseppe Filardo, Lisa A. Fortier, Alberto Giuffrida, Chris H. Jo, Jeremy Magalon, Gerard A. Malanga, Allan Mishra, Norimasa Nakamura, Scott A. Rodeo, Steve Samspon, Mikel Sánchez