Received: 16 August 2018
Accepted: 7 January 2019
First Online: 28 January 2019
Ethics approval and consent to participate
: The study was approved by the Institutional Review Board of Taipei Medical University (JIRB: 201312037). After detailed information, all study participants gave their written informed consent. The study protocol has been registered in Chinese Clinical Trial Registry (ChiCTR) (registry no.: ChiCTR-IOR-14005490).
: Not applicable.
: The authors declare that they have no competing interests.
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