Problematic internet use as an age-related multifaceted problem: Evidence from a two-site survey.

"Conflict of interest Dr. Grant has received research grants from NIDA (RC1DA028279-01), the National Center for Responsible Gaming, and Roche and Forest Pharmaceuticals. Dr. Grant receives compensation from Springer as the editor-in-chief of the Journal of Gambling Studies and has received royalties from McGraw Hill, Oxford University Press, Norton, and the APPI. Dr. Chamberlain consults for Cambridge Cognition and his involvement in this research was supported by an Intermediate Clinical Fellowship from the Wellcome Trust (UK; 110049/Z/15/Z). Dan Stein and Christine Lochner are funded by the Medical Research Council of South Africa. The other authors report no financial relationships with commercial interest. None of the aforementioned sources had any role in the study design, collection, analysis or interpretation of the data, writing the manuscript, or the decision to submit the paper for publication."

"Dr. Grant has received research grants from NIDA (RC1DA028279-01), the National Center for Responsible Gaming, and Roche and Forest Pharmaceuticals. Dr. Grant receives compensation from Springer as the editor-in-chief of the Journal of Gambling Studies and has received royalties from McGraw Hill, Oxford University Press, Norton, and the APPI. Dr. Chamberlain consults for Cambridge Cognition and his involvement in this research was supported by an Intermediate Clinical Fellowship from the Wellcome Trust (UK; 110049/Z/15/Z). Dan Stein and Christine Lochner are funded by the Medical Research Council of South Africa. The other authors report no financial relationships with commercial interest. None of the aforementioned sources had any role in the study design, collection, analysis or interpretation of the data, writing the manuscript, or the decision to submit the paper for publication."