*<p>Data were from Chaiyaphum, Sisaket and Ubon Ratchathani hospitals from 2004 to 2010, Loei hospital from 2006 to 2010, Mahasarakham and Nakhon Phanom hospitals from 2007 to 2010, Nong Khai, Udon Thani and Yasothon hospitals from 2008 to 2010, and Buriram hospital from 2009 to 2010.</p