Muhammad Jamil Akhtar, Muhammad Hamid Saeed, and Qaiser Mahmood et al. “MONITORING LINES AND TUBES ON CHEST RADIOGRAPH IN THE CARDIAC INTENSIVE CARE UNIT ”. Journal of University Medical & Dental College, Vol. 7, no. 3, Mar. 2016, pp. 1-9, http://jumdc.com/index.php/jumdc/article/view/191.