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Specially Programmed Respiratory Muscle Training for Singers by Using Respiratory Muscle Training Device (Ultrabreathe®)
Do Hyun Nam, Jae Yol Lim, Chul Min Ahn, Hong Shik Choi
Yonsei Med J.2004;45(5):810-817. Published online 2009 February 17
DOI: http://dx.doi.org/10.3349/ymj.2004.45.5.810
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