The Lancet Respiratory Medicine
The Lancet Respiratory Medicine > 2013 > 1 > 7 > 534-542
The Lancet Respiratory Medicine > 2013 > 1 > 7 > 543-550
The Lancet Respiratory Medicine > 2013 > 1 > 7 > 524-533
The Lancet Respiratory Medicine > 2013 > 1 > 7 > 551-563
The Lancet Respiratory Medicine > 2013 > 1 > 7 > 564-573
The Lancet Respiratory Medicine > 2013 > 1 > 7 > 574-584
The Lancet Respiratory Medicine > 2013 > 1 > 7 > 515-523