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Irregular Bedtime and Nocturnal Cellular Phone Usage as Risk Factors for Being Involved in Bullying: A Cross-Sectional Survey of Japanese Adolescents
- Mamoru Tochigi,
- Atsushi Nishida,
- Shinji Shimodera,
- Norihito Oshima,
- Ken Inoue,
- Yuji Okazaki,
- Tsukasa Sasaki
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- Published: September 19, 2012
- https://doi.org/10.1371/journal.pone.0045736