Is incentive spirometry superior to standard care in postoperative cardiac surgery on clinical outcomes and length of hospital and intensive care unit stay?: a systematic review with meta-analysis - Silva, Hiago Vinicius Costa; Lunardi, Adriana Claudia; Pinto, Ana Carolina Pereira Nunes; Macedo, Juliana Ribeiro Fonseca Franco de; Santos, Elinaldo da Conceicao dos (Brazilian journal of cardiovascular surgery, 2024)