Figure 3From: Smoking Cessation and Reduction in Schizophrenia (SCARIS) with e-cigarette: study protocol for a randomized control trial Study design. The study is a three-arm, randomized controlled, clinical trial designed to assess the efficacy and safety of the e-cigarette with 24 mg nicotine, the e-cigarette with no (0 mg) nicotine and the PAIPO nicotine-free inhalator.Back to article page