Vonkeman Harald E, Brouwers Jacobus R B J, van de Laar Mart A F J
Department of Rheumatology and Clinical Immunology, Medisch Spectrum Twente Hospital and University of Twente, Enschede, Netherlands.
BMJ. 2006 Apr 15;332(7546):895-8. doi: 10.1136/bmj.332.7546.895.