Appraising systematic reviews: a comprehensive guide to ensuring validity and reliability. - Nour Shaheen; Ahmed Shaheen; Alaa Ramadan; Mahmoud Tarek Hefnawy; Abdelraouf Ramadan; Ismail A. Ibrahim; Maged Elsayed Hassanein; Mohamed E. Ashour; Oliver E. Flouty (Frontiers Res. Metrics Anal., 2023)