The superficial medial collateral ligament is the primary medial restraint to knee laxity after cruciate-retaining or posterior-stabilised total knee arthroplasty: effects of implant type and partial release. - Athwal, KK; Daou, HE; Kittl, C; Davies, AJ; Deehan, DJ; Amis, AA (Knee Surgery, Sports Traumatology, Arthroscopy, 2015)