Effect of Flavonoids on Upper Respiratory Tract Infections and Immune Function: A Systematic Review and Meta-Analysis.
Adv Nutr. 2016 May 16;7(3):488-97. doi: 10.3945/an.115.010538. Print 2016 May.
Adv Nutr. 2016.
PMID: 27184276
Free PMC article.
Review.