Correspondence to:
Juan Xiao
Department of Pediatrics, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, No.1 Shuaifuyuan Wangfujing Dongcheng District, Beijing 100730, China.
Email: xiaojuan@pumch.cn
Running title: Efficacy of HCQ in children with chronic ITP and its association with ANA.