The impact of China’s national essential medicine system on improving rational drug use in primary health care facilities: an empirical study in four provincesYan Song(University of Macau)BMC Health Services ResearchOctober 24, 201410.1186/s12913-014-0507-3Cited by 70SaveCiteExport RISWatch citationsRelated PapersMaking medicines more accessible in China: An empirical study investigating the early progress of essential medicine system|PLoS ONE|2018|16