Polyphenolic Composition of <i>Rosa canina</i>, <i>Rosa sempervivens</i> and <i>Pyrocantha coccinea</i> Extracts and Assessment of Their Antioxidant Activity in Human Endothelial C... oleh Efthalia Kerasioti, Anna Apostolou, Ioannis Kafantaris, Konstantinos Chronis, Eleana Kokka, Christina Dimitriadou, Evangelia N. Tzanetou, Alexandros Priftis, Sofia D. Koulocheri, Serkos A. Haroutounian, Demetrios Kouretas, Dimitrios Stagos