Problematic internet use in children and adolescents: associations with psychiatric disorders and impairment. - Restrepo, Anita; Scheininger, Tohar; Clucas, Jon; Alexander, Lindsay; Salum, Giovanni A.; Georgiades, Kathy; Paksarian, Diana; Merikangas, Kathleen R.; Milham, Michael P. (BMC Psychiatry, 2020)