CJCP     2022 24 (6):  699-704    ISSN: 1008-8830  CN: 43-1301/R Progressive psychomotor regression for 2.5 years in a boy aged 5 years TIAN Mao-Qiang, CHEN Xiao-Xi, LI Lei, LANG Chang-Hui, LI Juan, CHEN Jing, YU Xiao-Hua, SHU Xiao-Mei Department of Pediatrics, Guizhou Children's Hospital/Affiliated Hospital of Zunyi Medical University, Zunyi, Guizhou 563003, China Received: 2022-01-14  Revised: null  Online: null Supporting info