Tokuda Hospital Sofia; Hematology department, Sofia, Bulgaria
Medizinische Universität Wien; Univ.Klinik für Innere Medizin I - Hämatologie & Hämostaseologie, Wien, Austria
Instituto Nacional de Cancerologia; Hematology, Bogota, Colombia
Fakultni nemocnice Olomouc; Onkologicka klinika, Olomouc, Czechia
UZ Leuven Gasthuisberg, Leuven, Belgium
Irccs Istituto Nazionale Dei Tumori (Int);S.C. Medicina Oncologica 2, Milano, Lombardia, Italy
Hackensack University Medical Center; Pediatric Rheumatology, Hackensack, New Jersey, United States
Children's National Medical Center; Pediatric Rheumatology, Washington, District of Columbia, United States
The Floating Hospital for Children at Tufts Medical Center, Boston, Massachusetts, United States