Wu, M C Sample size for comparison of changes in the presence of right censoring caused by death, withdrawal, and staggered entry. [electronic resource] - Controlled clinical trials Mar 1988 - 32-46 p. digital Publication Type: Comparative Study; Journal Article ISSN: 0197-2456 Standard No.: 10.1016/0197-2456(88)90007-4 doi Subjects--Topical Terms: Clinical Trials as TopicForced Expiratory VolumeHumansLung Diseases--therapyPatient DropoutsResearch Design