This must be made distinguished from studies investigating factors influencing certain research performance indicators.
As our intervention would reasonably prevent only endoluminal CRBSI, effort was made to distinguish this modality.
The vaccine trial protocol did not specify racial categories and no effort was made to distinguish linguistic and geographic groups.
No attempt was made to distinguish between excitatory and inhibitory synaptic currents in the present study.
In this analysis, no attempt was made to distinguish between epidemics of different scales.
An ulcer count was made to distinguish between pointed (<5 mm) and longitudinal (>5 mm) ulcers.
No attempt was made to distinguish one type of dementia from another in this severely disabled group.
No attempt was made to distinguish between different diagnostic groups (autism, Asperger's disorder and PDD-NOS).
A further possible criticism is that no attempt was made to distinguish the type of cells, neoplastic or reactive, which were positively staining.
In addition, an attempt was made to distinguish the cause of asymmetry of funnel plots to determine if this was due to heterogeneity or missing studies.
