CHINESE JOURNAL OF PREVENTIVE MEDICINE, Volume 42, Issue 11,2008, Pages 836-839, doi:10.3321/j.issn:0253-9624.2008.11.015
CHINESE JOURNAL OF PREVENTIVE MEDICINE, Volume 42, Issue 11,2008, Pages 848-850, doi:10.3321/j.issn:0253-9624.2008.11.019
CHINESE JOURNAL OF PREVENTIVE MEDICINE, Volume 42, Issue 11,2008, Pages 831-835, doi:10.3321/j.issn:0253-9624.2008.11.014
CHINESE JOURNAL OF PREVENTIVE MEDICINE, Volume 42, Issue 11,2008, Pages 789-792, doi:10.3321/j.issn:0253-9624.2008.11.004