Urbanization and Internet addiction in a nationally representative sample of adult community residents in Japan: A cross-sectional, multilevel study. Yasuma N, Watanabe K, Nishi D, Ishikawa H, Tachimori H, Takeshima T, Umeda M, Sampson L, Galea S, Kawakami N. Psychiatry Research. 2019 Mar. PMID: 31207855 DOI: 10.1016/j.psychres.2019.01.094