Age, gender, peers, life skills and quality of life influence risk of cell phone addiction among college teachers in Karnataka, India : a state level epidemiological analysis oleh BS Pradeep, Anusha B Shenoy, S Shahane, RN Srividya, Mutharaju Arelingaiah, Rochana D’Souza, Lavanya Garady, MK Jyoti, Suma Rache, Anand Dixit, Gananath Shetty Yekkar, Prathap Lingaiah, Shalini Rajneesh, G Gururaj