Journal of the Chinese Medical AssociationVolume 81, Issue 2, February 2018, Pages e8-e9Check ListAuthor links open overlay panelShow moreShareCitehttps://doi.org/10.1016/S1726-4901(18)30008-XGet rights and contentUnder a Creative Commons licenseopen accessPrevious article in issueNext article in issueRecommended articlesCited by (0)