RT Article T1 Is drinking contagious? An analysis of the collectivity of drinking behavior theory within a multilevel framework JF Alcohol and alcoholism VO 52 IS 6 SP 692 OP 698 A1 Braker, Astrid B A2 Soellner, Renate 1964- LA English YR 2017 UL https://krimdok.uni-tuebingen.de/Record/1912598698 DO 10.1093/alcalc/agx050