Department of Neonatology Loudi Central Hospital Loudi 417000 Hunan Province China;
Department of Neonatology Loudi Central Hospital Loudi 417000 Hunan Province China;
Department of Neonatology Loudi Central Hospital Loudi 417000 Hunan Province China;
Department of Neonatology Loudi Central Hospital Loudi 417000 Hunan Province China;
Department of Neonatology Loudi Central Hospital Loudi 417000 Hunan Province China;
Very low birth weight infants; MEIR; Physical development; Neurological development;