Effect of Clinic-Based and Asynchronous Video-Based Exercise on Clinic and Psychosocial Outcomes in Patients With Knee Osteoarthritis: Quasi-Experimental Study - Chidozie E Mbada; Henry Akintunji Awosika; Oluwatobi Ademola Sonuga; Micheal Akande; Tadesse Gebrye; Richard Woolf; Francis Fatoye (Journal of Medical Internet Research)