1. Department of Molecular and Cell Biology, University of Cape Town, Private Bag Rondebosch, Cape Town, South Africa
2. Division of Sleep Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts, USA
3. Health through Physical Activity, Lifestyle and Sport Research Centre & Division of Physiological Sciences, Department of Human Biology, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
4. Centre for Sport, Exercise and Life Sciences/School of Life Sciences, Coventry University, Coventry, UK