City Clinical Hospital #9, Minsk, Belarus
Szpital Uniwersytecki W Krakowie; Klinika Hematologii, Krakow, Poland
Medical University, Independent Public Clinical Hospital; Dept. of Hematology, SPSK, Bialystok, Poland
Hospital Universitario La Paz: Nefrologia Pediatrica, Madrid, Spain
IRCCS G. Gaslini; U.O. Nefrologia, Dialisi e Trapianto, Genova, Liguria, Italy
Hospital Universitario la Fe; Servicio de Nefrologia Pediatrica, Valencia, Spain
Pfizer Investigational Site, Philadelphia, Pennsylvania, United States