Ahmad, S. J., Ahmed, A. R., Kowalewski, K. F., Nickel, F., Rostami, K., Stocker, C. J., Hakky, S. M., Archid, R., McWhinnie, D., Mohajer-Bastami, A., Skiadopoulos Seimenis, D., Ahmad, S., Mansour, S., Ahmed, M. H., Mital, D., & Exadaktylos, A. K. (2020). Citation classics in general medical journals: assessing the quality of evidence; a systematic review. Gastroenterology and Hepatology from Bed to Bench, 13(2), 101–114. https://doi.org/10.22037/ghfbb.v13i2.1774