AI-Enabled Digital Phenotyping for Personalized Risk Stratification in Internet Gaming Disorder: A Privacy-Preserving Simulation Study - Athanasios Kranas; Evgenia Paxinou; Ioannis Bazakidis; Christina Koufopoulou; Petros Koufopoulos; Georgios Feretzakis; Vassilios S. Verykios (Journal of Personalized Medicine, 2026)