Asses the Impact of Early Starting Erythropoetin in the Reduction of Transfusions Blood in Childrens

Need for red blood cell transfusion;

Requirement of blood cell transfusion will be assessed as number of units received on a weekly basis

Time frame: 16 weeks (weekly assessment)

Best Quality of Life Scores;

We will apply the POQOLS (Pediatric Oncology Quality of Life Scale) and the PedsQL TM Multidimensional Fatigue Scale, both validated for pediatric population and in Portuguese language. The POQOLS includes 21 items distributed in three dimensions, which include "physical function and normal activities restriction" (09 items), "emotional problems" (07 items), and "response to active medical treatment" (05 items). Each answer is given on an ordinal scale of 7 points ranging from "never" to "very often". The resulting total score is given on a scale, and higher values mean lower quality of life.

Time frame: 16 weeks (weekly assessment)

Best Scores on the Fatigue Questionnaire;

We will apply the POQOLS (Pediatric Oncology Quality of Life Scale) and the PedsQL TM Multidimensional Fatigue Scale, both validated for pediatric population and in Portuguese language. The PedsQL TM Multidimensional Fatigue Scale items are reverse-scored and linearly transformed to a 0-100 scale (0 = 100, 1 = 75, 2 = 50, 3 = 25, 4 = 0), so that higher PedsQL Multidimensional Fatigue Scale scores indicate fewer symptoms of fatigue.

Time frame: 16 weeks (weekly assessment)

Analysis of adverse events and side effects associated with medication.

Adverse events will be monitored from the time the participant gives informed consent and up to 30 days after the last dose of study medication. Adverse events will be classified according to their severity and causality, being reported to the sponsor according to regulatory deadlines.

Time frame: 16 weeks (weekly assessment)