**Hiu Yan Wong, Hoi Yi Mo, Marc N. Potenza, Mung Ni Monica Chan, Wai Man Lau, Tsz Kwan Chui, Amir H. Pakpour and Chung-Ying Lin**

Relationships between Severity of Internet Gaming Disorder, Severity of Problematic Social Media Use, Sleep Quality and Psychological Distress Reprinted from: *Int. J. Environ. Res. Public Health* **2020**, *17*, 1879, doi:10.3390/ijerph17061879 . . **259**
