No evidence of dyspnea at rest, no exercise intolerance due to pulmonary insufficiency, and a pulse oximetry > % while breathing room air Pulse oximetry > % on room air if there is clinical indication for determination (e.g. dyspnea at rest) Pulse oximetry > % on room air if there is clinical indication for determination (e.g. dyspnea at rest) No evidence of dyspnea at rest, no exercise intolerance, and a pulse oximetry > % if there is clinical indication or determination; pulmonary function tests (PFTs) are not required No evidence of dyspnea at rest, no exercise intolerance, and a resting pulse oximetry reading > % on room air if there is clinical indication for determination No evidence of dyspnea at rest, no exercise intolerance, and a pulse oximetry > % at sea level if there is clinical indication for determination For children who are unable to cooperate for PFTs, the criteria are: no evidence of dyspnea at rest, no exercise intolerance, and a pulse oximetry reading of > % on room air Patients with a history of pulmonary dysfunction must have no evidence of dyspnea at rest, no exercise intolerance due to pulmonary insufficiency, and a pulse oximetry > % while breathing room air unless current dysfunction is due to the lymphoma in which case the patient is eligible Pulse oximetry > % on room air if there is clinical indication for determination (e.g. dyspnea at rest) Patients must have normal pulmonary function testing for age based on pulse oximetry Pulse oximetry > % on room air and no evidence of dyspnea at rest INCLUSION CRITERIA FOR STRATUM C: Pulse oximetry > % on room air and no evidence of dyspnea at rest Pulse oximetry >= % if there is clinical indication for determination No evidence of dyspnea at rest, no exercise intolerance, and a pulse oximetry > % Must have a minimum level of pulmonary reserve defined as ? grade dyspnea and pulse oximetry of ? % on room air No evidence of dyspnea at rest, no exercise intolerance, and a pulse oximetry > % Adequate pulmonary function as defined as: no evidence of dyspnea at rest, no exercise intolerance, and a pulse oximetry > % if there is clinical indication for determination No evidence of dyspnea at rest and pulse oximetry > % For children who are unable to perform pulmonary function tests but have no evidence of dyspnea at rest nor exercise intolerance nor abnormal chest X-ray (CXR), a pulse oximetry > % on room air is acceptable Must have a minimum level of pulmonary reserve defined as =< grade dyspnea and pulse oxygen > % on room air Patients must have no evidence of dyspnea at rest and a pulse oximetry > % while breathing room air RANDOMIZED PHASE II (ARMS K AND L): Patients must have no evidence of dyspnea at rest and a pulse oximetry > % while breathing room air Pulse oximetry > % if there is clinical indication for determination For children who are uncooperative for pulmonary function tests and have no evidence of dyspnea at rest or exercise intolerance, pulse oximetry > % on room air is considered acceptable, with a normal chest X-ray Oxygen saturation as measured by pulse oximetry is > % on room air and no evidence of dyspnea at rest No evidence of dyspnea at rest, no history of exercise intolerance, and a pulse oximetry > % Must have a minimum level of pulmonary reserve defined as ?Grade dyspnea and pulse oxygenation > % on room air Must have a minimum level of pulmonary reserve defined as ? Grade dyspnea and pulse oxygenation > % on room air Must have a minimum level of pulmonary reserve as ? Grade dyspnea and pulse oxygenation > % on room air. Must have a minimum level of pulmonary reserve defined as =< grade dyspnea and pulse oxygen > % on room air Adequate pulmonary function defined as:\r\n* No evidence of dyspnea at rest, no exercise intolerance, no chronic oxygen requirement, and room air pulse oximetry > % if there is a clinical indication for pulse oximetry; normal pulmonary function tests in patients who are capable of cooperating with testing (including diffusion capacity of the lung of carbon monoxide [DLCO]) are required if there is a clinical indication for determination; for patients who do not have respiratory symptoms, full pulmonary function tests (PFTs) are NOT required No evidence of dyspnea at rest, no exercise intolerance due to pulmonary insufficiency, and a pulse oximetry > % while breathing room air Patients must demonstrate a respiratory rate that is within normal limits for age, measured when afebrile and at rest (measured for a full minute) and pulse oximetry >= % on room air No evidence of dyspnea at rest and a pulse oximetry > % if there is clinical indication for determination Patients must not have any evidence of dyspnea at rest, exercise intolerance, and must have a pulse oximetry > % at sea level A pulse oximetry ? % at sea level (? % at altitude ? feet) if there is clinical indication for determination. Pulse > or < No evidence of dyspnea at rest, no exercise intolerance, and a pulse oximetry > % in room air, if there is clinical indication for determination Pulse > and < Room air desaturation at rest =< % Room air desaturation at rest =< % Room air desaturation at rest =< % For children who are unable to perform pulmonary function testing, no evidence of dyspnea at rest, no exercise intolerance, and a pulse oximetry > % on room air For children who are unable to perform pulmonary function testing, no evidence of dyspnea at rest, no exercise intolerance, and a pulse oximetry > % in room air