Authors: H Bootsma; P E Spronk; E J Ter Borg; E J Hummel; G de Boer; P C Limburg; C G Kallenberg Journal: Ann Rheum Dis Date: 1997-11 Impact factor: 19.103
Authors: H Bootsma; P Spronk; R Derksen; G de Boer; H Wolters-Dicke; J Hermans; P Limburg; F Gmelig-Meyling; L Kater; C Kallenberg Journal: Lancet Date: 1995-06-24 Impact factor: 79.321