PT - JOURNAL ARTICLE ED - , TI - More than 90% of the world’s children breathe toxic air every day DP - 2018 Dec 01 TA - Saudi Medical Journal PG - 1267--1268 VI - 39 IP - 12 4099 - http://smj.org.sa/content/39/12/1267.short 4100 - http://smj.org.sa/content/39/12/1267.full SO - Saudi Med J2018 Dec 01; 39