It is desirable that trial vectors which might produce no better fitness should not be evaluated.
From an ethical perspective, it is desirable that trials ascertain and report all deaths regardless of whether they appear to be related to study conduct or intervention, are unforeseen or non-specific.
Greater standardization of the methodology used is desirable in future trials.
Single scan techniques are highly desirable for clinical trials involving radiotracers because they increase logistical feasibility, improve patient compliance, and decrease the cost associated with the study.
Although reducing MRSA infection in the Samoan community is desirable, no controlled trials have demonstrated effective means of reducing community-associated MRSA infections in a community setting.
Several trials were done to use desirable solvents, unfortunately all trials failed to separate all the studied components.
An adequately powered randomized controlled trial appears desirable.
A prospective comparative trial is desirable to validate our results.
In these cases, a placebo-controlled trial is desirable.
However, although seemingly desirable, a randomised controlled trial over time would be ethically questionable and very difficult to perform.
