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. 2015 Aug 21;5(8):e008160. doi: 10.1136/bmjopen-2015-008160

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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

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Hierarchy for classification of consultations, using free text notes, diagnostic Read codes and medication prescription. GP, general practitioner; URTI, upper respiratory tract infection; LRTI, lower respiratory tract infection; Wheeze-ill, wheeze-related illness.