The Prevalence of Entamoeba gingivalis and Trichomonas tenax in Relation to Periodontal Disease among Patients Attending Dental Clinics in Urmia, Iran: A Cross-Sectional Study - Azadeh, Yahya; Khademvatan, Shahram; Goharfar, Zahra; Yousfi, Elham; Shahrabi-Farahani, Shokoufeh; Jafari, Rasool (Iranian Journal of Parasitology, 2026)