标题：LETTER TO THE EDITOR: IS IT BLUE LIGHT OR INCREASED ELECTROMAGNETIC FIELDS WHICH AFFECTS THE CIRCADIAN RHYTHM IN PEOPLE WHO USE SMARTPHONES AT NIGHT
出版社：THE SCHOOL OF PUBLIC HEALTH, TEHRAN UNIVERSITY OF MEDICAL SCIENCES
摘要：Dear Editor-in-Chief In Korea, in a dark environment at night, the cir-cadian illuminance (CIL) values for screens of three different commercial smartphones (two LCDs and one AMOLED from different manu-facturers) were greater than 41.3 biolux.
