PT - JOURNAL ARTICLE ED - , TI - Instructions to Authors DP - 2021 Feb 01 TA - Saudi Medical Journal PG - 239--243 VI - 42 IP - 2 4099 - http://smj.org.sa/content/42/2/239.short 4100 - http://smj.org.sa/content/42/2/239.full SO - Saudi Med J2021 Feb 01; 42