Combination therapy with gold and hydroxychloroquine in rheumatoid arthritis: a prospective, randomized, placebo-controlled study. - Scott,D.L.; Dawes,P.T.; Tunn,E.; Fowler,P.D.; Schadforth,M.F.; Fisher,J.; Clarke,S.; Collins,M.; Jones,P.; Popert,A.J.; Bacon,P.A. (Br J Rheumatol, 1989)