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Early undifferentiated connective tissue disease. I. Early clinical manifestation in a large cohort of patients with undifferentiated connective tissue diseases compared with cohorts of well established connective tissue disease.
Alarcón GS, Williams GV, Singer JZ, Steen VD, Clegg DO, Paulus HE, Billingsley LM, Luggen ME, Polisson RP, Willkens RF, et al. Alarcón GS, et al. Among authors: billingsley lm. J Rheumatol. 1991 Sep;18(9):1332-9. J Rheumatol. 1991. PMID: 1757934