The effect of Indian costus (Saussurea lappa) extract on the healing of chemically induced oral ulcer in rats: in vitro and in vivo study with histological evaluation. - Fansa HA; Sharfeldeen AERM; Baloush RAA; Majrashi MAA; Elbaz KRM; Mansour MAM; Kandeel MK; Ebaid AE; Elhussiny MEA; Mohamed HA; Alezzi Z; Abulwafa Z (Annals of medicine and surgery (2012), 2026)