Du Preez K, Seddon J A, Schaaf H S, Hessling A C
Desmond Tutu TB Centre, Department of Paediatrics and Child Health, Faculty of Medicine and Health Sciences, Stellenbosch University, Cape Town, South Africa.
S Afr Med J. 2020 Apr 2;110(5):345-346. doi: 10.7196/SAMJ.2020.v110i5.14728.