1 Subjects: “...plant studies...”

2 “.... There was no effect on study withdrawals due to adverse events. There was a large increased risk of dizziness...”

3 “... associated with a large increased risk of study withdrawal due to adverse events (1 RCT, 13.9% vs. 5.7%, RR...”

4 “... Library, and SCOPUS(r) databases, reference lists of included studies, submissions received after Federal...”