CJCP     2024 26 (7):  750-756    ISSN: 1008-8830  CN: 43-1301/R NFIX gene mutation causes Marshall-Smith syndrome in a pair of identical twins and literature review LIN Xue-Qin, QUAN Yu-Lin, HE Hai-Lan, PENG Jing Department of Pediatrics, Xiangya Hospital, Central South University, Changsha 410008, China Received: 2024-01-15  Revised: null  Online: null Supporting info null