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History
- Published online February 22, 2021.
Copyright & Usage
Copyright: © Saudi Medical Journal This is an open-access article distributed under the terms of the Creative Commons Attribution-Noncommercial License (CC BY-NC), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Author Information
- SA, E-mail: draalbarrak{at}yahoo.com
- Ministry of Health, SA, E-mail: gm_stephens{at}yahoo.com
- WHO Collaborative Centre for Virus Reference and Research, GB, E-mail: Roger.Hewson{at}hpa.org.uk
- Ministry of Health, Riyadh 11176, Kingdom of Saudi Arabia. Tel. +966 (1) 2124052. Fax. +966 (1) 2125052, SA, E-mail: zmemish{at}yahoo.com