[1] Elisabethinen Krankenhaus, Linz, Austria
[2] Med Univ Wien, Vienna, Austria
[3] Landesklinikum Salzburg, Salzburg, Austria
[4] Med Univ Graz, Graz, Austria
[5] St Anna Kinderkrankenhaus, Vienna, Austria
[6] Med Univ Innsbruck, A-6020 Innsbruck, Austria
[7] Austrian Stem Cell Transplantat Registry, Innsbruck, Austria