The Lancet Respiratory Medicine
The Lancet Respiratory Medicine > 2013 > 1 > 8 > 599-609
The Lancet Respiratory Medicine > 2013 > 1 > 8 > 610-620
The Lancet Respiratory Medicine > 2013 > 1 > 8 > 621-629
The Lancet Respiratory Medicine > 2013 > 1 > 8 > 630-638