- Correspondence to Dr. Xiaohui Li, Department of Cardiovascular Diseases, Children’s Hospital Capital Institute of Pediatrics, Beijing 100020, China; and Dr. Caifeng Li, Department of Rheumatology and Immunology, Beijing Children’s Hospital, Capital Medical University, Beijing 100020, China;
- Received November 19, 2017
- Revised June 29, 2018
- Accepted July 3, 2018
- First published July 19, 2018.
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