title: Response.
authors: Clinical and Experimental Sciences University of Southampton and Southampton General Hospital, Southampton, England. Electronic address: r.a.mackay@soton.ac.uk.
authors: Rose-Marie A
authors: RM
authors: Mackay
authors: Clinical and Experimental Sciences University of Southampton and Southampton General Hospital, Southampton, England; Department of Respiratory and Sleep Medicine, Hunter Medical Research Institute, John Hunter Hospital, Newcastle, NSW, Australia.
authors: Christopher L
authors: CL
authors: Grainge
authors: Clinical and Experimental Sciences University of Southampton and Southampton General Hospital, Southampton, England.
authors: Laurie C
authors: LC
authors: Lau
authors: Clinical and Experimental Sciences University of Southampton and Southampton General Hospital, Southampton, England; Southampton NIHR Respiratory Biomedical Research Unit, Southampton Centre for Biomedical Research, University Hospital Southampton NHS Foundation Trust, Southampton, England.
authors: Clair
authors: C
authors: Barber
authors: Southampton NIHR Respiratory Biomedical Research Unit, Southampton Centre for Biomedical Research, University Hospital Southampton NHS Foundation Trust, Southampton, England.
authors: Howard W
authors: HW
authors: Clark
authors: Clinical and Experimental Sciences University of Southampton and Southampton General Hospital, Southampton, England; Southampton NIHR Respiratory Biomedical Research Unit, Southampton Centre for Biomedical Research, University Hospital Southampton NHS Foundation Trust, Southampton, England.
authors: Peter H
authors: PH
authors: Howarth