İSKENDER SAYEK; FATIH AĞALAR. The principles of clinical research. Turkish Journal of Gastroenterology, [S. l.], v. 7, n. 3, p. 183–189, 2019. Disponível em: https://tjg.avesjournals.com/index.php/tjg/article/view/1146. Acesso em: 16 jul. 2025.