Recurrent Health Expenses in Primary Healthcare Institutions in Beijing 
ZHAO Xuan1,JIANG Yan2,MAN Xiao-wei2,ZHAO Li-ying2,XIE Qi-xin1,CHENG Wei2*
Chinese General Practice . 2018, (18): 2209 -2215 .  DOI: 10.3969/j.issn.1007-9572.2018.00.221