Stein, Christopher, Mould-Millman, Nee-Kofi, De Vries, Shaheem, Wallis, Lee. Access to out-of-hospital emergency care in Africa : consensus conference recommendations. 2016.
Stassen, Willem, Wallis, Lee, Lambert, Craig, Castren, Maaret, Kurland, Lisa. Percutaneous coronary intervention still not accessible for many South Africans. 2017.
Stein, Christopher, Wallis, Lee, Adetunji, Olufemi. Meeting national response time targets for priority 1 incidents in an urban emergency medical services system : more ambulances won’t help. 2015.
Stassen, Willem, Wallis, Lee, Vincent-Lambert, Craig, Castren, Maaret, Kurland, Lisa. The proportion of South Africans living within 60 and 120 minutes of a percutaneous coronary intervention facility. 2018.
Stassen, Willem, Wallis, Lee, Castren, Maaret, Vincent-Lambert, Craig, Kurland, Lisa. A prehospital randomised controlled trial in South Africa : challenges and lessons learnt. 2019.