Abbreviations
ALL Acute Lymphoblastic Leukemia
BMA Bone Marrow Aspirate
HB Hemoglobin
M1 Maintenance 1
M2 Maintenance 2
NPA Nasopharyngeal aspirate
PCR Polymerase chain reaction
RNA Ribonucleic Acid
RV Rhinoviruses
SD Standard deviation
SEHOP Sociedad Española de Hematología y Oncología Pediátrica - Spanish Society of Pediatric Hematology and Oncology
VRTI Viral Respiratory Tract Infection