[1] RM Gorbacheva Mem Inst Pediat Hematol Oncol & Tra, Pediat BMT, St Petersburg, Russia
[2] I Pavlov First State Med Univ, BMT, St Petersburg, Russia
[3] N Petrov Fed Res Inst Oncol, Pediat Canc, St Petersburg, Russia
[4] RM Gorbacheva Mem Inst Pediat Hematol Oncol & Tra, BMT, St Petersburg, Russia
[5] RM Gorbacheva Mem Inst Pediat Hematol Oncol & Tra, Surg, St Petersburg, Russia
[6] I Pavlov First State Med Univ, Oncol, St Petersburg, Russia
[7] RM Gorbacheva Mem Inst Pediat Hematol Oncol & Tra, Pediat Canc, St Petersburg, Russia