A new genetic background for the Jr(a–) blood group phenotype caused by the ABCG2*439T allele encoding a p.Arg147Trp change. Issue 12 (6th November 2017) - Wieckhusen, Carola; Rink, Gabi; Scharberg, Erwin A.; Rothenberger, Sina; Stürtzel, Annette; Richter, Ekkehard; Bugert, Peter