Tekyol, Davut, Ilker Akbas, Sinem Dogruyol, Abdullah Osman Kocak, and Zeynep Çakır. “Topical Lidocaine Anesthesia for Nasopharyngeal Sampling – a Double-Blind Randomized Placebo-Controlled Trial”. European Journal of Clinical and Experimental Medicine 20, no. 1 (March 30, 2022): 56–62. Accessed December 28, 2025. https://journals.ur.edu.pl/ejcem/article/view/11933.