van Tubergen A M, Landewé R B, van der Linden S
Department of Internal Medicine, Division of Rheumatology, University Hospital Maastricht, PO Box 5800, 6202 AZ Maastricht, The Netherlands.
Springer Semin Immunopathol. 2001;23(1-2):147-63. doi: 10.1007/s002810100064.