In Volume 93, Issue 6, June 2015, page 407, the name of the fifth author should be “Marc KC Chong.”
. 2015 Aug 1;93(8):588. doi: 10.2471/BLT.15.100815
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PMCID: PMC4572714 PMID: 26412906
This corrects the article "Changes in the perceived quality of primary care in Shanghai and Shenzhen, China: a difference-in-difference analysis" on page 407.