[1] Radboud Univ Nijmegen, Med Ctr, Dept Rheumatol, Nijmegen, Netherlands
[2] Univ W England, Bristol Royal Infirm, Sch Nursing, Fac Hlth & Life Sci, Bristol BS16 1QY, Avon, England
[3] Radboud Univ Nijmegen, Med Ctr, Dept Qual Care, Nijmegen, Netherlands