The studied population included individuals from Southern Brazil, more precisely from the North and the Northwest area of the state of Paraná (N/NW Paraná). Two hundred and nine unrelated individuals registered as red blood donors or bone marrow donors by the Hemo- centro Regional de Maringá, spontaneously signed a con- sent form to participate in this research. All of them were Japanese descendants, unrelated and healthy. They stated whether their parents and grandparent were from Japan only(JB – Japanese Brazilians),or if one or two were from another ethnic origin(MJB – Mixed Japanese-Brazilians).