1. Cascella M, Rajnik M, Aleem A, Dulebohn SC, Di Napoli R. Features,evaluationandtreatmentofcoronavirus(COVID19). n: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2020 Jan-. Available from: https://www.ncbi.nlm.nih.gov/books/NBK554776/ [Last accessed on 2020 Jul 10].
2. Return of the coronavirus: 2019-nCoV;Gralinski;Viruses,2020
3. Coronavirus disease 2019 (COVID-19).Emerging and future challenges for dental and oral medicine;Meng;J Dent Res,2020
4. Guan WJ, Ni ZY, Hu Y, Liang WH, Ou CQ, He JX, et al. Clinical characteristics of coronavirus disease 2019 in China. N Engl J Med 2020;382:1-13. [doi: 10.1056/NEJMoa2002032]. Available from: https:// NEJMoa2002032.pdf (nih.gov) [Last accessed on 2020 Jul 10; Last updated on 2020 Mar 06].
5. COVID-19 Coronavirus Pandemic. United State: Dadax Limited; Worldometer. Available from: https://www.worldometers.info/coronavirus/. [Last accessed on 2020 Nov 19].