World Journal of Pediatrics (ISSN 1708-8569) is a quarterly journal published by Children’s Hospital, Zhejiang University School of Medicine, China. It aims to publish peer-reviewed original papers, reviews and editorials concerned with clinical practice and research in pediatrics. All submitted papers are reviewed by at least two referees expert in the field of the submitted paper. The journal is abstracted and indexed in SCI Expanded, IM/MEDLINE, Chemical Abstracts (CA) and VINITI database.    (Free full text available for every article in PDF version)