The American College of Rheumatology 1990 Criteria for the Classification of Fibromyalgia. Report of the Multicenter Criteria Committee - Wolfe, F; Smythe, H A; Yunus, M B; Bennett, R M; Bombardier, C; Goldenberg, D L; Tugwell, P; Campbell, S M; Abeles, M; Clark, P; Fam, A G; Farber, S J; Fiechtner, J J; Franklin, C M; Gatter, R A; Hamaty, D; Lessard, J; Lichtbroun, A S; Masi, A T; McCain, G A; Reynolds, W J; Romano, T J; Russell, I J; Sheon, R P (Arthritis Rheum, 1990)