Effect of intranasal administration of Erigeron annuus and Carthamus tinctorius extracts in a rat model of olfactory dysfunction induced by 3-methylindole - Myeongguk Jeong; Hyeokjin Kwon; Yeeun Kim; Kyung-Yae Hyun; Yeongdon Ju; Go-Eun Choi; Chulhun L. Chang (PLoS ONE)