THE JOURNAL OF PRACTICAL MEDICINE, Volume 27, Issue 20,2011, Pages 3758-3759, doi:10.3969/j.issn.1006-5725.2011.20.055
HEALTH VOCATIONAL EDUCATION, Volume 29, Issue 20,2011, Pages 138-140, doi:10.3969/j.issn.1671-1246.2011.20.079
Chinese Journal of Primary Medicine and Pharmacy, Volume 18, Issue 20,2011, Pages 2791-2792, doi:10.3760/cma.j.issn.1008-6706.2011.20.029
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 91, Issue 20,2011, Pages 1438, doi:10.3760/cma.j.issn.0376-2491.2011.20.019
YIAYAO QIANYAN, Volume 01, Issue 20,2011, Pages 183-184, doi:10.3969/j.issn.2095-1752.2011.20.174