Dr. Won Jo specializes in digestive health. Dr. Jo is a Harvard-trained physician and provides care to patients with conditions related to the esophagus, stomach, gallbladder, <br>liver, pancreas, small intestines, colon and rectum. Procedures performed include colonoscopies, endoscopic retrograde cholangiopancreatography, upper endoscopy, esophageal dilation, percutaneous endoscopic gastrostomy, pH testing, flexible sigmoidoscopy and hemorrhoidal banding.