∗Present address: Instituto de Física Corpuscular, CSIC-Universitat de València, Apartado de Correros 22085, E46071 Valencia, Spain. Partially supported by the Ministerio de Ciencia e Innovación under Grant No. FPA2007-60323, by CPAN (Grant No. CSD200700042), and by the European Commission MRTN FLAVIAnet under Contract No. MRTN-CT-2006-035482. †Speaker. ‡Supported in part by Studienstiftung des...

BACKGROUND AND PURPOSE Continued surveillance of stroke trends among the very elderly is needed to determine how best to mitigate the likely rise with time in the proportion of strokes in this relatively understudied age group. This study assessed recent time trends in the proportion of hospitalized patients with stroke who are very elderly. METHODS Data were obtained from all US states that ...

El objetivo del estudio es realizar una histórica revisión sistemática sobre el comercio electrónico en ISI – Web of Knowledge, 1997- 2006. Se enfocó investigación cualitativa basado análisis documental mediante la bibliográfica de las producciones relacionadas con los factores críticos éxito electrónico. analizó 67 artículos clasificados tres tipos estudios: campo (50), casos (9) y conceptual ...