Abdallah Sabry, Mona, Saafan, Ali Mohamed, El-Shennawy, Hanaa Mohamed, Hussine, Amal Ali, Abd El- Aziz, Doaa Mohamed, Abdel Fadeel, Doaa Ahmed. The Efficiency of Photodynamic Therapy in the Management of Pain in Patients with Oral Lichen Planus. Journal of Chemical Health Risks. 2021;11(0):189-196. doi:10.22034/jchr.2021.686355