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St. George\'s Respiratory Questionnaire for COPD Patients (SGRQ-C) (Jones PW, Quirk FH, Baveystock CM, and Littlejohns PA. Self-complete measure of health status for chronic airflow limitation. The St. George\'s Respiratory Questionnaire. Am Rev Respir Dis. 1992 Jun; 145(6):1321-7).
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