1. University of Cape Town; Department of Paediatrics; 5th Floor ICH Building, Red Cross Memorial Children's Hospital Klipfontein Road, Rondebosch, 7700 Cape Town South Africa
2. Red Cross War Memorial Children's Hospital and University of Cape Town; Pediatric Intensive Care, Division of Pediatric Critical Care and Children's Heart Disease; Cape Town South Africa 8000
3. Red Cross War Memorial Children's Hospital and University of Cape Town; Pulmonology, and Paediatric Medicine; 5th Floor ICH Building, Red Cross War Memorial Children?s Hospital Klipfontein Road, Rondebosch, 7700 Cape Town South Africa
4. Sefako Makgatho Health Sciences University; Physiotherapy Department, School of Health Care Sciences; Molotlegi Street Garankuwa Pretoria (Gauteng) South Africa 0208
5. University of Cape Town; Department of Health and Rehabilitation Sciences, Division of Physiotherapy; Cape Town South Africa
6. Inkendaal Rehabilitation Hospital; Centre for Home Mechanical Ventilation and Specialized Centre for Neuromuscular Diseases; Inkendaalstraat 1 Vlezenbeek Belgium B-1602