NATIONAL MEDICAL JOURNAL OF CHINA, Volume 82, Issue 7,2002, Pages 453-455, doi:10.3760/j:issn:0376-2491.2002.07.006
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 82, Issue 7,2002, Pages 445-448, doi:10.3760/j:issn:0376-2491.2002.07.004
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NATIONAL MEDICAL JOURNAL OF CHINA, Volume 82, Issue 7,2002, Pages 440-444, doi:10.3760/j:issn:0376-2491.2002.07.003
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 82, Issue 7,2002, Pages 459-461, doi:10.3760/j:issn:0376-2491.2002.07.008