FOREIGN MEDICAL SCIENCES, Volume 21, Issue 4,2001, Pages 189-191, doi:10.3760/cma.j.issn.1673-4416.2001.04.018
FOREIGN MEDICAL SCIENCES, Volume 21, Issue 4,2001, Pages 183-185, doi:10.3760/cma.j.issn.1673-4416.2001.04.016
FOREIGN MEDICAL SCIENCES, Volume 21, Issue 4,2001, Pages 180-182, doi:10.3760/cma.j.issn.1673-4416.2001.04.015