1. Medical Gases Group; Air Liquide Santé International; Centre de Recherche Claude-Delorme; Les Loges-en-Josas France
2. Department of Mechanical Engineering; Lafayette College; Easton Pennsylvania
3. National Institute of Health Research Biomedical Research Unit in Respiratory Disease; Southampton United Kingdom
4. Department of Medical Physics and Bioengineeing; University Hospital Southampton NHS Foundation Trust; Southampton United Kingdom
5. Faculty of Health Sciences; Southampton UK University Hospital Southampton NHS Foundation Trust; Southampton United Kingdom