Placebo-Controlled, Double-Blind, Randomized Study of a Dry Guarana Extract in Patients with Head and Neck Tumors Undergoing Chemoradiotherapy: Effects on Fatigue and Quality of LifeSuelen Patrícia dos Santos Martins, Auro del Giglio, Cynthia Lemos Ferreira|Journal of Dietary Supplements|2016Cited by 16