CD8A and Barrett esophagus: In the normal looking squamous esophagus of controls and BE patients, relatively low percentages of CD103+-cells inside the CD8+GranzymeB+-population (CD8+GranzymeB+CD103+) were found, 25±4% in proximal squamous esophageal epithelium of controls (C SQ 5 cm) and 21±5% in squamous esophageal epithelium of BE patients (BE SQ 5 cm) (Figure 6, panel A).