作者: J. S. Barnholtz-Sloan , B. McEvoy , M. D. Shriver , T. R. Rebbeck
DOI: 10.1158/1055-9965.EPI-07-0491
关键词:
摘要: Historically, racial groups have been defined by common geographic origins and shared physical characteristics, such as skin color, facial features, hair texture. Linnaeus's Systema Naturae ([1][1]) described four (Europeanus, Asiaticus, Americanus, Africanus), which were