About the Authors

Morar R

Department of Pulmonology and Critical Care, Charlotte Maxeke Johannesburg Academic Hospital and University of the Witwatersrand, South Africa

Richards GA

Department of Pulmonology and Critical Care, Charlotte Maxeke Johannesburg Academic Hospital and University of the Witwatersrand, South Africa

Murray J

National Institute of Occupational Health of the National Health Laboratory Services and Faculty of Public Health, University of the Witwatersrand, South Africa

Corresponding Author

Email: rajenmorar@webmail.co.za