1. Institute for Transfusion Medicine; University Hospital Essen; Essen Germany
2. Laboratory of Immunogenetics and Histocompatibility (LIGH); Federal University of Paraná, Genetics Department; Curitiba Brazil
3. Ministry of Education of Brazil; Capes Foundation; Brasília Brazil
4. Department of Gynecology and Obstetrics; University of Duisburg-Essen; Essen Germany