RecruitingClinical trialCharacterizing Sleep Among Long-term Survivors of Childhood CancerThe patients are being asked to take part in this clinical trial because they received cancer treatment as a child at St. Jude. The study comprehensively examines sleep among three distinct diagnostic groups of survivors in the SJLIFE cohort: ALL, CNS tumors, and non-CNS solid tumors. Primary Objective The primary aim of this protocol is to estimate the prevalence of various sleep disorders among long-term survivors of childhood ALL, CNS tumors, and non- CNS solid tumors. Exploratory Objective The exploratory objective of the study is to explore associations between the prevalence of sleep disorders and clinical outcomes collected in SJLIFE.