1. Sheffield Pulmonary Vascular Diseases Unit, Sheffield Teaching Hospitals NHS Foundation Trust, Sheffield, United Kingdom
2. Department of Allied Health Professions, College of Health, Wellbeing and Life Sciences, Sheffield Hallam University, Sheffield, United Kingdom
3. Department of Infection, Immunity and Cardiovascular Disease, The University of Sheffield, Sheffield, United Kingdom
4. Nursing, Midwifery and Social Work, The University of Manchester, Manchester, United Kingdom; and
5. Department of Nursing, Faculty of Health, Psychology and Social Care, Manchester Metropolitan University, Manchester, United Kingdom