1. A search algorithm for identifying likely users and non-users of marijuana from the free text of the electronic medical record Keyhani, Salomeh; Vali, Marzieh; Cohen, Beth E.; Woodbridge, Alexandra; Arenson, Melanie; Eilkhani, Elnaz; Aivadyan, Christina; Hasin, Deborah S. 2018 Articles MarijuanaKeyword searchingMedical records--Data processingEpidemiology