Effect of Er: YAG laser therapy in non-surgical periodontal treatment: an umbrella review - Gufran, Khalid; Alqahtani, Abdullah Saad; Alasqah, Mohammed; Alsakr, Abdulaziz; Alkharaan, Hassan; Ghurmallah Alzahrani, Hanadi; Almutairi, Abdullah (BMC Oral Health, 2024)