[1] Univ Regensburg, D-93053 Regensburg, Germany
[2] Univ Padua, Padua, Italy
[3] G Gaslini Inst Children, Genoa, Italy
[4] Inst Gustave Roussy, Villejuif, France
[5] Univ Hosp Jena, Jena, Germany
[6] Univ Milano Bicocca, Monza, Italy
[7] Univ Med Ctr, Utrecht, Netherlands
[8] Great Ormond St Hosp Sick Children, London, England
[9] Univ Hamburg Eppendorf, Hamburg, Germany
[10] Univ Childrens Hosp, Ulm, Germany
[11] Univ Childrens Hosp, Tubingen, Germany
[12] Schneider Childrens Med Ctr, Petah Tiqwa, Israel
[13] Royal Manchester Childrens Hosp, Manchester M27 1HA, Lancs, England
[14] Univ Childrens Hosp, Heidelberg, Germany
[15] Hannover Med Sch, Hannover, Germany
[16] St Anna Childrens Hosp, A-1090 Vienna, Austria
[17] Univ Childrens Hosp, Munich, Germany
[18] Our Ladys Childrens Hosp, Dublin, Ireland
[19] Skane Univ Hosp, Lund, Sweden
[20] Univ Hosp Motol, Prague, Czech Republic
[21] Univ Childrens Hosp, Wurzburg, Germany
[22] Univ Childrens Hosp, Munster, Germany
[23] Univ Gothenburg, Dept Pediat, Gothenburg, Sweden
[24] Karolinska Inst, Stockholm, Sweden
[25] Uppsala Univ, Childrens Hosp, Uppsala, Sweden
[26] Univ Halle Wittenberg, Halle, Germany
[27] Univ Childrens Hosp, Geneva, Switzerland
[28] Univ Hosp Schleswig Holstein, Kiel, Germany
[29] Univ Childrens Hosp, Frankfurt, Germany
[30] Boston Univ, Boston, MA 02215 USA
[31] Gentium SpA, Villa Guardia, Como, Italy