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Abstract: Very little genetic data exist on Haitians, an estimated 1.2 million of whom, not including illegal immigrants, reside in the United States. The absence of genetic data on a population of this size reduces the discriminatory power of criminal and missing‐person DNA databases in the United States and Caribbean. We present a forensic population study that provides the first genetic data set for Haiti. This study uses hypervariable segment one (HVS‐1) mitochondrial DNA (mtDNA) nucleotide sequences from 291 subjects primarily from rural areas of northern and southern Haiti, where admixture would be minimal. Our results showed that the African maternal genetic component of Haitians had slightly higher West‐Central African admixture than African‐Americans and Dominicans, but considerably less than Afro‐Brazilians. These results lay the foundation for further forensic genetics studies in the Haitian population and serve as a model for forensic mtDNA identification of individuals in other isolated or rural communities.  相似文献   
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A nonrandom national U.S. sample of 946 homicide crime scenes--supplied by the FBI Behavioral Science Unit for purposes of research--was studied to delineate the prevalence, types, levels, and motives for staging in domestic, nonserial sexual, serial sexual, and general felony homicides. Stagers were found to be a relatively small group who employ a variety of methods to alter the crime scene in an attempt to redirect the investigation away from themselves as logical suspects. Results also suggest that different types of homicides have different staging rates based primarily on the relationship (or connection) between offender and victim. Implications for investigations and understanding this type of crime scene behavior are discussed.  相似文献   
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The key issues of the health care system are often conceptualized as involving three basic dimensions: 1) the quality of health care provided, 2) access to the health care system, and 3) the cost of health care. Following two decades of rapidly escalating health costs throughout advanced industrial societies, the relationships among these three dimensions now constitute what has been called an “unholy trinity” in that improvements along one dimension will almost inevitably provoke problems in terms of one or both of the others. This symposium examines two distinct types of reform that have been developed in response to the crisis in health care costs. The first focuses upon attempts to reorganize existing institutions in order to make them more effective and cost‐efficient. The second considers the move toward “evidence‐based medicine,” that is, more critically evaluating health care outcomes to make sure that treatments are effective and cost‐efficient.  相似文献   
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