Cost-benefit in preoperative studies of patients undergoing ambulatory surgical procedures classified as ASA 1.: A single-center observational study. Actas Médicas (Ecuador), [S. l.], v. 33, n. 1, p. 32–37, 2023. DOI: 10.61284/83. Disponível em: http://actasmedicas.ec/index.php/am/article/view/83.. Acesso em: 12 may. 2026.