CJCP     2016 18 (10):  965-970    ISSN: 1008-8830  CN: 43-1301/R Background patterns and sleep-wake cycles on amplitude-integrated electroencephalography in preterm infants with periventricular-intraventricular hemorrhage YANG Lei, XU Wei, YAN Chao-Ying Department of Neonatology, First Bethune Hospital of Jilin University, Changchun 130021, China Received: 2016-04-09  Revised: 2016-05-11  Online: null Supporting info null