1. Department of Paediatrics; University of Cape Town; Cape Town South Africa
2. Pediatric Intensive Care, Division of Pediatric Critical Care and Children's Heart Disease; Red Cross War Memorial Children's Hospital and University of Cape Town; Cape Town South Africa
3. Pulmonology, and Paediatric Medicine; Red Cross War Memorial Children's Hospital and University of Cape Town; Cape Town South Africa
4. Physiotherapy Department, School of Health Care Sciences; Sefako Makgatho Health Sciences University; Garankuwa South Africa
5. School of Health Sciences; University of Brighton; Brighton UK
6. Centre for Home Mechanical Ventilation and Specialized Centre for Neuromuscular Diseases; Inkendaal Rehabilitation Hospital; Vlezenbeek Belgium