Fetal trisomy 13 and 21 mosaicism diagnosed at aminocentesis : a case reportVelthut, Agne; Peters, Maire; Roovere, Tiiu; Kilusk, Gerli; Horelli-Kuitunen, Nina; Šois, Marek; Salumets, AndresPrenatal diagnosis2009 / 10, p. 995-997 https://pubmed.ncbi.nlm.nih.gov/19565618/