Mehsood, Dawood Kamal, et al. “VEIN GRAFTS TO LEFT ANTERIOR DESCENDING (LAD) IN EMERGENCY CORONARY ARTERY BYPASS GRAFT (CABG) OF ELDERLY – DOES IT MERIT?”. Pakistan Armed Forces Medical Journal, vol. 65, no. (SUPPL), May 2020, pp. S11-15, https://pafmj.org/PAFMJ/article/view/4303.