Identifying Medication Abuse and Adverse Effects from Tweets: University of Michigan at #SMM4H 2020. - V. G. Vinod Vydiswaran; Deahan Yu; Xinyan Zhao; Ermioni Carr; Jonathan Martindale; Jingcheng Xiao; Noha Ghannam; Matteo Althoen; Alexis Castellanos; Neel Patel; Daniel Vasquez (SMM4H@COLING, 2020)