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Serotonin-immunorective cells in the stomach. A-B: Glandular region; C: Non-glandular region. A: Presence of open (arrow) and closed (arrowhead) type cells interspersed in the epithelium (Ep); B: Highlight of open (arrow) and closed (arrowhead) type immunorective (IR) cells; C: Indications of open (arrow) and closed (arrowhead) IR cells.
