Dear Editor,rnThe outbreak of coronavirus disease 2019(COVID-19)has been declared a pandemic by the World Health Organization(WHO)and has resulted in the worst public health crisis since World War Ⅱ(Wang et al.2020).The causative pathogen of COVID-19 is a novel strain of coronavirus named severe acute respiratory syndrome coronavirus-2(SARS-CoV-2);SARS-CoV-2 is the seventh coronavirus that has been found to infect humans(Gorbalenya etal.2020;Zhang and Holmes 2020;Zhu etal.2020).As of June 8,2020,more than 7 million confirmed cases of COVID-19 have been reported worldwide,resulting in approximately 400,000 deaths(WHO 2020).