The lack of both a non-malnourished, HIV-infected control group and a malnourished, uninfected control group made it impossible to explore the independent, and potentially synergistic, contributions of HIV and malnutrition to microbial translocation.
Due to our inability to model relevant "primitive living systems" in reality, it is as yet impossible to explore the plausibility and mechanisms of the "genetic takeover" by experiments.
The rising number of diabetes medications available today (more tomorrow) makes it hard, if not impossible, to explore all possible combinations and sequences of combinations that could be recommended.
Since the current study lacks a third group with no US, it is impossible to explore the effects of exercise and US separately except in parts where the continuous US group has shown significant differences in comparison to the placebo group.
And it is impossible to explore this literature without becoming aware that the impact of Dupont-Sommer has not merely been to rouse resistance.
As computers can perform the algebraic calculations as much as 1,000 times faster than they can solve the corresponding differential equations, the computational time savings are enormous and problems otherwise impossible to explore become tractable.
Yet the wide range of chronic conditions made it impossible to explore the impact of nature of the disease and that of disease severity.
The ICD-10 definition explicitly includes anxiety and depression as symptoms of post-concussion syndrome, but these were not included in our definition because doing so would have made it impossible to explore the independent role of mental health problems and TBI in the genesis of PCS.
So far, Zaeef said, it had been impossible to explore how much common ground there might be between the Taliban and the United States.
Moreover, because the data described in this study refer to the date and place of death (and not of the accident), it was impossible to explore the exact seasonal distribution of crashes.
