TY - JOUR TI - Problematic smartphone use and mental health problems: current state of research and future directions AU - Elhai, J.D. AU - Levine, J.C. AU - Hall, B.J. JO - Dusunen Adam Journal of Psychiatry and Neurological Sciences PY - 2019 VL - 32 SP - 1 EP - 3 DO - 10.14744/DAJPNS.2019.00001 ER -