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Effect of Light Emitted by Smartphones at Bedtime on Circadian Rhythm and Sleep: Is It Different between Day Worker and Shift Worker?
Dongyeop Kim, Hyunjin Jo, Su Jung Choi, Eun Yeon Joo
J Sleep Med. 2021;18(1):29-36.   Published online April 29, 2021
DOI: https://doi.org/10.13078/jsm.210003
                        
Smartphone Application Usage Patterns in Individuals with High Bedtime Procrastination: A Preliminary Study
Sonhye Jeoung, Sooyeon Suh
J Sleep Med. 2020;17(1):49-57.   Published online June 30, 2020
DOI: https://doi.org/10.13078/jsm.200002
                        
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Volume18 No. 2
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