فهرس المقالات Doaa Mohamed Abd El- Aziz المقاله 1 - The Efficiency of Photodynamic Therapy in the Management of Pain in Patients with Oral Lichen Planus 10.22034/jchr.2021.686355 Mona Abdallah Sabry Ali Mohamed Saafan Hanaa Mohamed El-Shennawy Amal Ali Hussine Doaa Mohamed Abd El- Aziz Doaa Ahmed Abdel Fadeel Journal of Chemical Health Risks , العدد 5 , السنة 11 , زمستان 2021