[1] Univ Coll London Hosp NHS Fdn Trust, Dept Resp Med, London, England
[2] UCL, Ctr Human Hlth & Performance, Inst Sport Exercise & Hlth, London, England
[3] UCL, Inst Hlth Informat, London, England
[4] Barts Hlth NHS Trust, Dept Cardiol, London, England
[5] Newcastle Univ, Fac Med Sci, Newcastle Upon Tyne, Tyne & Wear, England
[6] Imperial Coll Healthcare NHS Trust, Imperial Syncope Unit, London, England
[7] Brighton & Sussex Med Sch, Falmer, England
[8] UCL, Inst Sport Exercise & Hlth ISEH, Div Surg & Intervent Sci, London, England
[9] Royal Brompton Hosp, London, England
[10] Swansea Univ, Appl Sports Technol Exercise & Med Res Ctr, Swansea, W Glam, Wales
[11] Univ Oxford, Nuffield Dept Womens & Reprod Hlth, Oxford, England
[12] Def Med Rehabil Ctr Stanford Hall, Acad Dept Mil Rehabil, Loughborough, Leics, England
[13] Univ Nottingham, Sch Med, Nottingham, England
[14] Stellenbosch Univ, Fac Sci, Dept Physiol Sci, Stellenbosch, South Africa
[15] Univ Liverpool, Fac Hlth & Life Sci, Inst Syst Mol & Integrat Biol, Dept Biochem & Syst Biol, Liverpool, Merseyside, England
[16] Univ Oxford, Radcliffe Dept Med, Div Cardiovasc Med, Oxford, England
[17] Oxford Univ Hosp NHS Fdn Trust, Radcliffe Dept Med, Div Cardiovasc Med, Oxford, England
[18] Univ Oxford, Dept Psychiat, Oxford, England
[19] Oxford Hlth NHS Fdn Trust, Oxford, England
[20] Univ Sussex, Sch Psychol, Falmer BN1 9RH, England
[21] Univ Sussex, Sussex Neurosci, Falmer BN1 9RH, England