New grey relational analysis of hospitalization expense of patients with 5 major diseases in a city of Jiangsu Province
LI Xiao-xiao, ZHANG Xiao, LIU Rong, et al
上海交通大学学报（医学版） . 2015, (4): 577 .  DOI: 11.3969/j.issn.1674-8115.2015.04.022