Valgus deformity and proximal subluxation of the rheumatoid elbow: a radiographic 15 year follow up study of 148 elbows
J T Lehtinen, K Kaarela, M J Kauppi, E A Belt, H Mäenpää, P Kuusela, M U K Lehto
Annals of the Rheumatic Diseases Aug 2001, 60 (8) 765-769; DOI: 10.1136/ard.60.8.765