Bush Andrew, Kleinert Sabine, Pavord Ian D
National Heart and Lung Institute, Imperial College London, London, UK; Royal Brompton and Harefield NHS Foundation Trust, London, UK.
The Lancet, London, UK.
Lancet. 2015 Apr 4;385(9975):1273-5. doi: 10.1016/S0140-6736(15)60654-7.