Authors: S Endres; R Ghorbani; V E Kelley; K Georgilis; G Lonnemann; J W van der Meer; J G Cannon; T S Rogers; M S Klempner; P C Weber Journal: N Engl J Med Date: 1989-02-02 Impact factor: 91.245
Authors: G T Espersen; N Grunnet; H H Lervang; G L Nielsen; B S Thomsen; K L Faarvang; J Dyerberg; E Ernst Journal: Clin Rheumatol Date: 1992-09 Impact factor: 2.980