1. Department of Pediatric Hematology; The Affiliated Hospital of Qingdao University; Qingdao China
2. Department of Pediatrics; Huai'an Maternity and Child Healthcare Hospital Affiliated to Yangzhou University School of Medicine; Huai'an China
3. Department of Stomatology; Weihai Municipal Hospital; Weihai China
4. Department of Hematology; The Affiliated Hospital of Qingdao University; Qingdao China