摘要
The authors wish to retract this article because they submitted two articles of different types written based on partially the same data to Chinese Medical Journal （CMJ） and another journal, and both were published. The authors would like to apologize to the editors and readers of the CMJ for submitting this controversial paper.
The authors wish to retract this article because they submitted two articles of different types written based on partially the same data to Chinese Medical Journal （CMJ） and another journal, and both were published. The authors would like to apologize to the editors and readers of the CMJ for submitting this controversial paper.
