[1] Verge Cinta Hosp, Catalan Hlth Inst ICS, Unit Internal Med, Tortosa, Spain
[2] Rovira & Virgili Univ, Dept Nursing, Tortosa, Spain
[3] Verge Cinta Hosp, Catalan Hlth Inst ICS, Pere Virgili Inst Hlth Res IISPV, Dept Pathol, Tortosa, Spain
[4] Univ Hosp Santa Maria, Dept Rheumatol, Lleida, Spain
[5] Luther Coll, Dept Psychol, Decorah, IA USA
[6] Rovira & Virgili Univ, Dept Nursing, Tarragona, Spain