1. Laboratory of Cancer Genetics, Laboratory Medicine Center (LMC), University Hospital Linkoping, Sweden.
2. Department of Biomedicine and Surgery, Faculty of Health Sciences, Linkoping University, SE-581 85 Linkoping, Sweden.
3. Laboratorio de Imunogenetica, Departamento de Genetica, Universidade Federal do Rio Grande do Sul, Porto Alegre RS, Brazil.
4. Divison of Clinical Chemistry, Faculty of Health Sciences, Linkoping University, SE-581 85 Linkoping, Sweden.