Authors: N Baber; L D Halliday; W J van den Heuvel; R W Walker; R Sibeon; J P Keenan; T Littler; M L Orme Journal: Ann Rheum Dis Date: 1979-04 Impact factor: 19.103
Authors: E P Gall; E M Caperton; J E McComb; R Messner; C V Multz; M O'Hanlan; R F Willkens Journal: J Rheumatol Date: 1982 May-Jun Impact factor: 4.666