...Saber Yezli, PhD Anas Khan, MD To whom correspondence should be addressed. Dr. Saber Yezli, Global Centre for Mass Gatherings Medicine, Public Health Directorate, Ministry of Health, Riyadh Saudi Arabia, Tel: 96611401555 ext 1863, mail: saber.yezli gmail.com 3 4 2020 9 4 2020 21 4...