Text and Data Mining valid from 2019-04-11
Received: 2 November 2018
Accepted: 2 April 2019
First Online: 11 April 2019
Ethics approval and consent to participate
: The study was approved by the Ethics Committee of Qilu Hospital of Shandong University (clinical trial registration No. NCT02088216). All patients gave written informed consent for participation in this study.
: All patients’ data were collected with consent from individual patient at the time of enrollment throughout data collection period.
: The authors declare that they have no competing interests.
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