Wuttiwongsanon C, Teeraboonyakul W 2019. Comparative study between Efficacy of 0.025% Oxymetazoline with 1% Lidocaine and 1% Ephedrine with 2% Lidocaine in Nasal Preparation before Nasal Endoscopy. Journal of The Department of Medical Services. 44, 1 (Feb. 2019), 63–66.