RT Journal Article SR Electronic T1 NEW WHO-LED STUDY SAYS MAJORITY OF ADOLESCENTS WORLDWIDE ARE NOT SUFFICIENTLY PHYSICALLY ACTIVE, PUTTING THEIR CURRENT AND FUTURE HEALTH AT RISK JF Saudi Medical Journal JO Saudi Med J FD Prince Sultan Military Medical City SP 1307 OP 1309 VO 40 IS 12 YR 2019 UL http://smj.org.sa/content/40/12/1307.abstract AB