Received:2016-10-09 Revised:2016-10-09 Online:2011-06-25 Published:2011-06-25

CLC Number:

[1]	. [J]. Medical Reserch and Education, 2012, 29(6): 107-108.
[2]	. [J]. Medical Reserch and Education, 2011, 28(6): 111-112.
[3]	. [J]. Medical Reserch and Education, 2010, 27(6): 112-112.
[4]	. [J]. Medical Reserch and Education, 2009, 26(2): 67-67.

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