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Mueller, M; Young, C. What is the evidence surrounding facial mask exemptions for COVID-19? 2020 Sep 14; Document no.: EOC091101-01 ESR. In: COVID-19 Rapid Evidence Reviews [Internet]. SK: SK COVID Evidence Support Team, c2020. 19 p. (CEST evidence search report) https://covid19evidencereviews.saskhealthauthority.ca/en/permalink/coviddoc176

Williams-Roberts, H; McLean, M; Groot, G; Young, C; Mueller, M; Miller, L. What evidence is there to support medical exemptions for mask wearing? 2020 Sep 17; Document no.: EOC091101 RR. In: COVID-19 Rapid Evidence Reviews [Internet]. SK: SK COVID Evidence Support Team, c2020. 20 p. (CEST rapid review report) https://covid19evidencereviews.saskhealthauthority.ca/en/permalink/coviddoc177