Mulder R, Layloo N, Mulder van Staden S. COVID-19: Focus on masks and respirators - Implications for oral health-care workers. S. Afr. dent. j. [Internet]. 2020 May 31 [cited 2024 Apr. 24];75(4):175-82. Available from: https://journals.assaf.org.za/index.php/sadj/article/view/8767