Vyas Sameer, Khandelwal Ashish, Sandhu Manavjeet S, Verma Subhash, Khandelwal Niranjan
Department of Radiodiagnosis, PGIMER, Postgraduate Institute of Medical Education and Research, Chandigarh, India.
Trop Gastroenterol. 2012 Oct-Dec;33(4):289-92. doi: 10.7869/tg.2012.75.