1. Division of HPB Surgery, Department of Surgery, Faculty of Medicine, University of Colombo, Colombo, Sri Lanka
2. The University Surgical Unit, The National Hospital of Sri Lanka, Colombo, Sri Lanka
3. Department of Endocrinology and Diabetes, The National Hospital of Sri Lanka, Colombo, Sri Lanka
4. Department of Interventional Radiology, The National Hospital of Sri Lanka, Colombo, Sri Lanka