The Lancet Respiratory Medicine
The Lancet Respiratory Medicine > 2013 > 1 > 3 > 251-261
The Lancet Respiratory Medicine > 2013 > 1 > 4 > 309-317
The Lancet Respiratory Medicine > 2013 > 1 > 4 > 293-300
The Lancet Respiratory Medicine > 2013 > 1 > 4 > 318-328
The Lancet Respiratory Medicine > 2013 > 1 > 4 > 339-346