Text and Data Mining valid from 2018-11-16
Received: 15 March 2018
Accepted: 4 November 2018
First Online: 16 November 2018
Ethics approval and consent to participate
: Our study protocol was approved by the Medical Ethics Committee of the International Peace Maternity and Child Health Hospital, School of Medicine, Shanghai Jiaotong University (Reference number: GKLW 2017–87). And as the study was designed to retrospectively analyze the data of patients who had finished their treatments, the informed consents for collecting and analyzing their medical records were previously signed at the beginning of their treatments.
: Not applicable.
: The authors declare that they have no competing interests.
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