National Medical Journal of China, , Issue 47,2014, Pages 3754-3754, doi:10.3760/j.issn.0376-2491.2014.47.022
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National Medical Journal of China, , Issue 47,2014, Pages 3699-3704, doi:10.3760/cma.j.issn.0376-2491.2014.47.002
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National Medical Journal of China, , Issue 47,2014, Pages 3704-3704, doi:10.3760/j.issn.0376-2491.2014.47.004