Attitudes of Swiss mothers toward unrelated umbilical cord blood banking 6 months after donation - Danzer,E.; Holzgreve,W.; Troeger,C.; Kostka,U.; Steimann,S.; Bitzer,J.; Gratwohl,A.; Tichelli,A.; Seelmann,K.; Surbek,D.V. (Transfusion, 2003)