CHINESE JOURNAL OF MODERN NURSING, Volume 15, Issue 25,2009, Pages 2484-2486, doi:10.3760/cma.j.issn.1674-2907.2009.25.004
CONTEMPORARY MEDICINE, Volume 15, Issue 25,2009, Pages 20-22, doi:10.3969/j.issn.1009-4393.2009.25.011
CHINA MEDICAL HERALD, Volume 6, Issue 25,2009, Pages 168-168, doi:10.3969/j.issn.1673-7210.2009.25.108