Funding for this research was provided by:
South African Medical Research Council
Fogarty International Center (2 D43 TW000812-06)
Center for Asthma in the Workplace
South African National Research Foundation (FA2006040700028)
Allergy Society of South Africa
University of Cape Town Research Committee
Baking Industry in Cape Town
Text and Data Mining valid from 2020-01-11
Received: 3 September 2019
Accepted: 24 December 2019
First Online: 11 January 2020
Compliance with ethical standards
: The authors declare that they have no competing interests.
: The original study received ethical approval from the Research Ethics Committee of the University of Cape Town (reference no. 272/2002). Informed consent was obtained from all study subjects as per the protocol. The protocol can be accessed on-line (ExternalRef removed).