1 “..., quasiexperimental nonrandomized trials, and cohort studies that addressed the benefits and harms of observed...”

2 “...STUDY SELECTION: Randomized, controlled trials; controlled observational studies; and good-quality...”

3 “...STUDY SELECTION: Randomized, controlled trials; controlled observational studies; and good-quality...”

4 “...Observational studies were included. Studies conducted in resource-poor settings were included...”

5 “...Observational studies were included. Studies conducted in resource-poor settings were included...”

6 “...A variety of surgical approaches were used; there were few comparative studies of nonoperative...”

7 “... to the rapid escalation of e-cigarette use among youth, both prevention and cessation trials that target...”

8 “... to the rapid escalation of e-cigarette use among youth, both prevention and cessation trials that target...”