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Shortness of breath and other respiratory symptoms frequently complicate the symptomatic management of terminally ill adults. The extent of the problem in children is not known, but anecdotal evidence from nurses and physicians experienced in…

Background Although even randomization (that is, approximately 1:1 randomization ratio in study arms) provides the greatest statistical power, designed uneven randomization (DUR), (for example, 1:2 or 1:3) is used to increase participation rates.…
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