Medial closure supracondylar femoral osteotomy: an effective solution for long-term treatment of arthritic valgus knee? - Uboldi FM; Travi M; Tradati D; Maione A; Manunta AF; Berruto M (Journal of orthopaedics and traumatology : official journal of the Italian Society of Orthopaedics and Traumatology, 2021)