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. 2014 May 16;13:38. doi: 10.1186/1475-9276-13-38

Table 3.

Basic information of study sample

Year Total enrollees---all towns
Sample information---14 towns
Original Excluded Included Enrollees Inpatients Outpatients
2007
709900
14065
695835
559869
16635
250137
2008
790245
11551
778694
628579
31674
352644
2009
768210
9223
758987
613103
33355
415404
2010
701191
3757
697434
697434
24695
320927
2011 740485 13635 726850 726850 33674 319558