Letter to the Editor regarding ¿Effectiveness of preoperative breathing exercise interventions in patients undergoing cardiac surgery: a systematic review¿ Margarida Rodrigues; Inês Machado Vaz;

Response to the letter from Rodrigues M and Vaz IM regarding the article ¿Effectiveness of a preoperative breathing exercise intervention in patients undergoing cardiac surgery: a systematic review¿ Soraia Nicola Rodrigues; Helga Rafael Henriques; Maria Adriana Henriques;