Antioxidant activities, polyphenolic composition and their correlation analysis on Hibiscus sabdarifa L. (sabdariffa) calices Journal title: Journal of Herbal Drugs Authors: Hakimeh Oloumi; Shahryar Shakeri; Majid Behzadi Subject(s): Medicine, Agricultural Science, Biotechnology, Botany, Genetics, Plant Sciences, Marketing, Pharmacology, Toxicology