O. Salem, Sara, Dalal S. Al-Dossari, Ibrahim A. Al-Zaagi, and Naseem Akhtar Qureshi. “Lean Six Sigma, Root Cause Analysis to Enhance Patient Safety in Healthcare Organizations: A Narrative Review, 2000-2016”. Journal of Advances in Medical and Pharmaceutical Sciences 12, no. 1 (February 2, 2017): 1-26. Accessed September 19, 2021. https://journaljamps.com/index.php/JAMPS/article/view/16392.