1. “Time for dabs”: Analyzing Twitter data on marijuana concentrates across the U.S. Daniulaityte, Raminta; Nahhas, Ramzi W.; Wijeratne, Sanjaya; Carlson, Robert G.; Lamy, Francois R.; Martins, Silvia S.; Boyer, Edward W.; Smith, G. Alan; Sheth, Amit 2015 Articles EpidemiologyMarijuanaVapingElectronic cigarettesDrug abuseDrug abuse--EpidemiologyTwitter