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Bennett RM, Burckhardt CS, Clark SR, O'Reilly CA, Wiens AN, Campbell SM.Bennett RM, et al. Among authors: burckhardt cs.J Rheumatol. 1996 Mar;23(3):521-8.J Rheumatol. 1996.PMID: 8832996
Burckhardt CS, Clark SR, Bennett RM.Burckhardt CS, et al.Arthritis Care Res. 1992 Dec;5(4):216-22. doi: 10.1002/art.1790050406.Arthritis Care Res. 1992.PMID: 1489768