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1471-2466-12-69
1471-2466-12-69
http://dx.doi.org/10.1186/1471-2466-12-69
Singing classes for chronic obstructive pulmonary disease: a randomized controlled trial.
P356
Q34474742-7D8DAD4A-CF35-4F35-AF2C-174FE113E5FF
P356
1471-2466-12-69
http://dx.doi.org/10.1186/1471-2466-12-69