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6 x weekly Liuzijue Qigong (Phonation with movement) for 6 months improves FEV1% pred (+7.6%), 6 minute walk distance (48m) and SGRQ (- 16.2) vs usual care #singingforlunghealth #COPD https://t.co/kUIG3QAz41 https://t.co/nHaC3yztPR