Lalla-Edward, S., Fischer, A., Venter, W., Scheuermaier, K., Meel, R., Hankins, C., … Vos, A. (2019). Cross-sectional study of the health of southern African truck drivers. BMJ Open, 9(10), e032025. https://doi.org/10.1136/bmjopen-2019-032025 (Original work published 2019)