Othman, W.N., AbdElhamed, R. and Elsaid, A. 2017. Assess the effectiveness of deep breathing exercise with incentive spirometry on respiratory status of patients who undergone cardiothoracic surgery. International journal of Nursing Didactics. 7, 4 (Apr. 2017), 85–91. DOI:https://doi.org/10.15520/ijnd.2017.vol7.iss4.209.85-91.