RT Article T1 Longitudinal within- and between-person associations of substance use, social influences, and loneliness among adolescents and emerging adults who use drugs A1 Bonar, Erin E. A2 Goldstick, Jason E. A2 Coughlin, Lara N. A2 Lin, Lewei A. A2 Carter, Patrick M. A2 Walton, Maureen A. LA English YR 2022 UL https://krimdok.uni-tuebingen.de/Record/1912612917 NO 0001-6998 DO 10.1080/16066359.2021.2009466