Affiliations

• ¹ Dept of Community Health and Epidemiology, The Hospital for Sick Children, Toronto, ON, Canada.
• ² Children's Lung Health, Wal-yan Respiratory Research Centre, Telethon Kids Institute, Perth, Australia.
• ³ School of Physiotherapy and Exercise Science, Curtin University, Perth, Australia.
• ⁴ Pulmonary, Critical Care and Sleep Medicine, Saint Louis University School of Medicine, St Louis, MO, USA.
• ⁵ School of Health Sciences, Swinburne University of Technology, Melbourne, Australia.
• ⁶ Respiratory Medicine, Sheffield Children's Hospital NHS Foundation Trust, Sheffield, UK.
• ⁷ Pulmonary Laboratory, Isala Klinieken, Zwolle, The Netherlands.
• ⁸ Lung Function and Sleep, University Hospital Birmingham and Institute of Clinical Sciences, University of Birmingham, Birmingham, UK.