Keller C, Paixao A, Moraes MA, Rabelo ER, Goldmeier S. Pain scale: implementation for patients in the immediate postoperative period of cardiac surgery. Rev. Esc. Enferm. USP [Internet]. 2013 Jun. 1 [cited 2024 May 23];47(3):621-5. Available from: https://revistas.usp.br/reeusp/article/view/78003