Research letter: Inability to draw intersecting pentagons as a predictor of unsatisfactory spirometry technique in elderly hospital inpatients.

This source preferred by Stephen Allen

Authors: Allen, S.C. and Yeung, P.

http://ageing.oxfordjournals.org/cgi/content/full/35/3/304

Journal: Age and Ageing

Volume: 35

Pages: 304-306

ISSN: 0002-0729

DOI: 10.1093/ageing/afj090

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