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. 2015 Apr 8;5(4):e006979. doi: 10.1136/bmjopen-2014-006979

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Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://group.bmj.com/group/rights-licensing/permissions

This is an Open Access article distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/

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Immunohistochemical staining of glucose transporters (GLUT1) and (GLUT2) in bronchial biopsies obtained from a healthy subject. The upper panel shows GLUT1 staining with distinct cell membrane staining associated with lymphocytes within the submucosa (*). The lower panel demonstrates GLUT2 staining associated with the apical epithelium. The inset provides a magnification of the epithelium illustrating diffuse cytoplasmic staining, with more pronounced staining around the nuclear membrane.