Few plants have undergone a complete phytochemical profiling, while the majority has either been studied for specific compounds, if at all.
Most of the studies pairing tracers in the same tumor have either been performed in SPECT studies in the brain or in preclinical optical imaging of surface tumors [7].
However, these studies have either been cross-sectional or used much smaller samples than this study.
7 9 Most studies exploring the role of obesity in determining postoperative complication rates have either been single centre, retrospective cohort studies or secondary analyses of previously collected data.
Many carbon cost-benefit studies have either been devoted to plantations (i.e., afforestation, and reforestation; [8],[11],[12]), or to comparisons between timber production and forest conversion to crops as alternatives to forest conservation [13]-[16] [13]-[16]
To date, however, such studies have either been based on qualitative grip typologies (as characterized 'by-eye') or been confined to the movements of the striking arm proximally from the wrist.
Most previous CTEV studies have either been based on routine data, which gives large sample sizes but lack certainty about the diagnosis of CTEV, or on small clinical series from single centres, which may be highly selected.
Of course, such studies have either been observational in nature, small in sample size or both.
However, these studies have either been in animal models or in small non-comparative human series.
Previous studies have either been retrospective or have sampled high risk referred children or siblings of affected individuals.
