However, all these studies are limited by small sample size.
Those that did not, were hampered by small sample size or poorly fitting curves.
However, previous reports have been limited by small sample size and single-institution design.
Previous studies have been limited by small sample size and imprecise end points.
Previous studies are limited by small sample size, narrow geographic area, and a wide range of resource availability.
The few dozens of published studies are limited by small sample size and poorly structured study designs.
Prior works have been limited by small sample size, single center data, or the inability to be broadly generalized.
Although this is a pilot study, its design was limited by small sample size, lack of randomization and control group.
Many early studies investigating this region were limited by small sample size, poor statistical methodology, population stratification and variable disease definition.
Finally, the study is limited by small sample size.
This may be explained by small sample size and overlapping confidence intervals.
