| Population group | Number of individuals sampled for the HLA-A, HLA-B, HLA-C, and HLA-DRB1 genes | Source | http://www.allelefrequencies.net [11], uploaded by | Published references |
| Wallachia | , , | — | Constantinescu et al. [12] | Hungary | A = 1,644; B = 1,653 DRB1 = 2,402 | — | Inotai et al. [13] | Greece | , , | Iniotaki and Siorenta, 2012, Bone Marrow Registry | — | Serbia | A, B, | Andric et al., 2010, Bone Marrow Registry | Andric et al. [14] | Croatia | A, B, | Grubic et al., 2011, Bone Marrow Registry | Grubic et al. [15] | Czech Republic | A, B, , | Czech National Marrow Donors Registry, 2014 | — | Slovakia | , , | Kušíková, 2013, Bone Marrow Registry | — | Poland | A, B, C, | Nowak et al., 2013, Bone Marrow Registry | — | Russia | A, B, C, | Lebedeva, 2009, Moscow Stem Cell Bank | — | Germany | A, B, | Seidl et al., 2005, Bone Marrow Registry | — | France | A, B, C, | Alizadeh et al., 2006, Bone Marrow Registry | — | Italy | A, , | Rendine et al., 1998, Bone Marrow Registry | Rendine et al. [16] | Portugal | A, B, | Ligeiro, 2009, Bone Marrow Registry | — | Spain | | Garcia-Sanz, 2007, Bone Marrow Registry | — |
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