Children who are unaware of their diagnosis will be excluded from the study as it would not be possible to ascertain their own perceptions as to how they have been coping with their disease. Children who are unable to understand and complete the measures being used due to cognitive deficits will not be administered those measures. This excludes all children whose current cognitive abilities fall 2 standard deviations or more below the normal range of cognitive functioning according to the Full Scale Intelligence Quotient (FSIQ). If a child's cognitive abilities fall below this criterion after the first data collections point (for example, if they become encephalopathic), we will not collect data from the child but we will continue to collect data from the caretaker. Care providers and children who cannot understand English will also be excluded from the study.