[1] Univ Southampton, Sch Psychol, Fac Environm & Life Sci, Southampton, Hants, England
[2] Univ Bath, Dept Psychol, Bath, Avon, England
[3] Univ Southampton, NIHR Southampton Resp Biomed Res Ctr, Fac Med, Southampton, Hants, England
[4] Univ East Anglia, Dept Clin Psychol, Norwich, Norfolk, England
[5] Acclarogen Ltd, Cambridge, England
[6] European Lung Fdn, Sheffield, S Yorkshire, England
[7] Univ Amsterdam, Amsterdam Univ Med Ctr, Dept Resp Med, Amsterdam, Netherlands
[8] Univ Plymouth, Sch Psychol, Plymouth, Devon, England
[9] Plymouth Marjon Univ, Sch Sport Hlth & Wellbeing, Plymouth, Devon, England
[10] Queens Univ Belfast, Wellcome Wolfson Inst Expt Med, Belfast, Antrim, North Ireland
[11] Charles Univ Prague, Univ Hosp Hradec Kralove, Dept Resp Med, Prague, Czech Republic
[12] Univ Med Ctr Ljubljana, Dept Pulm Dis & Allergy, Ljubljana, Slovenia
[13] Univ Ljubljana, Med Fac, Ljubljana, Slovenia
[14] Univ Med Ctr Maribor, Dept Pulm Dis, Maribor, Slovenia
[15] Med Ctr Leeuwarden, Leeuwarden, Netherlands
[16] Bispebjerg Hosp, Dept Resp Med, Copenhagen, Denmark
[17] Athens Chest Hosp Sotiria, Athens, Greece
[18] Ctr Hosp Univ Coimbra, Hosp Univ Coimbra, Pulmonol Unit, Coimbra, Portugal
[19] Univ Coimbra, Ctr Pulmonol, Fac Med, Coimbra, Portugal
[20] European Resp Soc ERS, Lausanne, Switzerland
[21] GSK, Resp Clin Sci, Brentford, England