Predict CHimio-or Radiation-induced NAusea and Vomiting in Children/adolescents Treated for Cancer

"BARF Scale, validated in paediatrics, is graduated from 0 to 10 and shows 6 increasingly nauseous faces. A child/adolescent will be considered at risk of NV if he/she declares a score greater than or equal to 4 out of 10 on at least one of the 4 observation times.~This scale can be used by the child him/herself, from the age of 4; or by a close adult, usually present at the child's side during treatment."