Received: 14 November 2016
Accepted: 30 January 2018
First Online: 6 February 2018
Ethics approval and consent to participate
: The study received ethical approval from the institutional review board of The First Affiliated Hospital of Guangzhou University of Traditional Chinese Medicine (FAH-GZTCM-2013-054). Written informed consent was obtained from all patients.
: The investigators obtained consent to publish from the participant to report individual patient data.
: The authors declare that they have no competing interests.
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