1. Pathology and Clinical Laboratory Department, Fundación Santa Fe de Bogotá Teaching Hospital, Colombia, Calle 119, No. 7-75, Bogotá, Colombia
2. Universidad de los Andes, School of Medicine, Cra 1, No. 18A-12, Bogotá, Colombia
3. Gastroenterology Department, Fundación Santa Fe de Bogotá Teaching Hospital, Calle 119, No. 7-75, Bogotá, Colombia