“The Prevalence and Risk Factors for Anxiety in Frontline Nurses under COVID-19 Pandemic Based on a Large Cross-Sectional Study Using the Propensity Score-Matched Method ”. Archives of Clinical Psychiatry (São Paulo), vol. 48, no. 5, Oct. 2021, pp. 221-8, https://doi.org/10.15761/0101-60830000000311.