Chris RuiWen Kuo1, Rory Chan1, Brian Lipworth2. 1. Scottish Centre for Respiratory Research, University of Dundee, Ninewells Hospital and Medical School, Dundee, Scotland, United Kingdom. 2. Scottish Centre for Respiratory Research, University of Dundee, Ninewells Hospital and Medical School, Dundee, Scotland, United Kingdom. Electronic address: b.j.lipworth@dundee.ac.uk.