Workload of Public Health Services in Primary Medical and Health Institutions: a Seven-year Trend Analysis 
SHI Jianhua,GU Huining,QIAN Mengcen,JIANG Hongli
Chinese General Practice . 2020, (34): 4291 -4297 .  DOI: 10.12114/j.issn.1007-9572.2020.00.480