Hai Nam, L., 		Thanh Quang, V., 		Tuan Sơn, N., & 		Dinh Thi, D.
2020 Jun 24.  Clinical Features of Chronic Sinusitis in Adult Patients in the National Otorhinolaryngology Hospital of Vietnam in 2019. VNU Journal of Science: Medical and Pharmaceutical Sciences. [Online] 36:2