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Revathy Marimuthu Shanmugam, Chitra Shanmugam, Manimaran Murugesan, Muthukumaran Kalyansundaram, Sathya Gopalsamy, Amiya Ranjan 
World J Gastrointest Endosc 11(11):541-547. Published online Nov 16, 2019. doi: 10.4253/wjge.v11.i11.541