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I. Mcinnes et al., 5-YEAR FOLLOW-UP OF 675 RHEUMATOID-ARTHRITIS (RA) PATIENTS ENROLLED IN PROSPECTIVE TRIALS AND TREATED WITH GOLD, PENICILLAMINE (PEN) OR SULFASALAZINE (SASP) IN A SINGLE-CENTER, British journal of rheumatology, 32, 1993, pp. 18-18