[Correspondence] Revisiting platelet-rich plasma for knee osteoarthritis

We read with interest the Seminar by Margreet Kloppenburg and colleagues,1 which provides a comprehensive overview of osteoarthritis. However, we were surprised by the assertion that there is an absence of evidence for the use of platelet-rich plasma for knee osteoarthritis. This conclusion, based primarily on the RESTORE trial,2 overlooks important and recent high-quality data.