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. 2012 Nov 6;7(11):e48609. doi: 10.1371/journal.pone.0048609

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This is an open-access article distributed under the terms of the Creative Commons Public Domain declaration, which stipulates that, once placed in the public domain, this work may be freely reproduced, distributed, transmitted, modified, built upon, or otherwise used by anyone for any lawful purpose.

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Detailed legend. Influenza cases among patients hospitalized with acute lower respiratory infection (ALRI) – Sa Kaeo and Nakhon Phanom, Thailand, January 2009 – December 2010. *NT, not typed **Nurses did not routinely enroll patients at night or on weekends.