New grey correlation and degree of structure variation analysis of hospitalization cost of childhood pneumonia
ZHU Wei-jun1, MA Jin1, CUI Wen-bin2, YUAN Su-wei1
JOURNAL OF SHANGHAI JIAOTONG UNIVERSITY (MEDICAL SCIENCE) . 2020, (5): 666 -670 .  DOI: 10.3969/j.issn.1674-8115.2020.05.017