Boscolo-Rizzo P, et al.. JAMA Otolaryngol Head Neck Surg. 2020 Jul 2;146(8):729–32.
[10] https://www.nytimes.com/2020/08/05/well/live/coronavirus-covid-symptoms.html?searchResultPosition=1
[12]Parra A, et al.. A retrospective descriptive study. Psychiatry Res. 2020 Sep;291:113254.