Wikoff D, Doepker C, Welsh B, Urban J, Henderson R, Brorby G, Britt J, Harvey S, Goldberger J, Myers E, O’Brien C, Peck J, Lieberman H, Weaver C, Tenebein M. 2015. Systematic review of the adverse cardiovascular effects of caffeine consumption in healthy adults, pregnant women, adolescents, and children. PROSPERO 2015:CRD42015026673 Available from http://www.crd.york.ac.uk/PROSPERO/display_record. asp?ID=CRD42015026673 (Systematic Review Protocol Registration)