CHINESE JOURNAL OF CANCER PREVENTION AND TREATMENT, Volume 13, Issue 21,2006, Pages 1601-1604, doi:10.3969/j.issn.1673-5269.2006.21.001
CENTRAL PLAINS MEDICAL JOURNAL, Volume 33, Issue 21,2006, Pages 78, doi:10.3760/cma.j.issn.1674-4756.2006.21.059
JOURNAL OF MEDICAL FORUM, Volume 27, Issue 21,2006, Pages 16-17, doi:10.3969/j.issn.1672-3422.2006.21.008
HEALTH VOCATIONAL EDUCATION, Volume 24, Issue 21,2006, Pages 11-13, doi:10.3969/j.issn.1671-1246.2006.21.004
JOURNAL OF PRACTICAL MEDICAL TECHNIQUES, Volume 13, Issue 21,2006, Pages 3812-3813, doi:10.3969/j.issn.1671-5098.2006.21.077