Reproducibility of the semiflexed (metatarsophalangeal) radiographic knee position and automated measurements of medial tibiofemoral joint space width in a multicenter clinical trial of knee osteoarthritis - Buckland-Wright,J.C.; Ward,R.J.; Peterfy,C.; Mojcik,C.F.; Leff,R.L. (J Rheumatol, 2004)