Blood samples were collected from unrelated individuals of Chinese Han ethnic group in Chengdu of China. DNAwas extracted using Chelex method (1). PCR amplification conditions can be accessed at http://www.legalmed.org/dna/DXS6809.htm (2). The volume of PCR reaction for each locus was 37.5 µL. The PCR products were analyzed by horizontal non-denaturing polyacrylamide gel electrophoresis with discontinuous buffer system and visualized by sliver staining (2,3). Data were analyzed using POWERSTATS program (4).