Bigel formulations of St. John's wort extract in wound healing: toxicological aspects. - Sotirova, Yoana; Vankova, Deyana; Tasinov, Oskan; Stoeva, Stefka; Hristova, Minka; Iliev, Ivelin; Georgieva, Svetlana; Kiselova-Kaneva, Yoana; Andonova, Velichka (Biotechnology & Biotechnological Equipment, 2023)