[1] Guys & St Thomas NHS Fdn Trust, London, England
[2] St Anna Kinderkrebsforsch eV, Vienna, Austria
[3] CHU Vaudois, CH-1011 Lausanne, Switzerland
[4] Schneider Childrens Med Ctr Israel, Petah Tiqwa, Israel
[5] Royal Marsden NHS Hosp, Sutton, Surrey, England
[6] Vienna Gen Hosp, Vienna, Austria
[7] Ist Nazl Tumori, Div Nucl Med, I-20133 Milan, Italy
[8] Ghent Univ Hosp, Dept Nucl Med, Ghent, Belgium
[9] Russells Hall Hosp, Dudley, England
[10] Great Ormond St Hosp Sick Children, London, England
[11] Giannina Gaslini Childrens Hosp, Genoa, Italy
[12] Schneider Childrens Med Ctr Israel, Tel Aviv, Israel
[13] Inst Gustave Roussy, Villejuif, France
[14] Hosp La Fe, Pediat Oncol Unit, E-46009 Valencia, Spain
[15] Portuguese Inst Oncol, Lisbon, Portugal
[16] Univ Hosp Motol, Prague, Czech Republic
[17] Aarhus Univ Hosp, DK-8000 Aarhus, Denmark
[18] Ist Nazl Tumori, I-20133 Milan, Italy
[19] Univ Oslo, Rikshosp, N-0027 Oslo, Norway
[20] St Anna Childrens Hosp & Res Inst, Vienna, Austria