The great heterogeneity of endpoints (immediate or delayed, minor or major complications) complicates comparison of studies.
The high complexity of the wheat genome produced by such factors as retrotransposable element insertion [ 5] and polyploidy, has complicated comparisons between the genomes of closely related species.
Furthermore, postprocessing and modeling methods may affect the results and may complicate comparison across studies [39].
Different radar design and noise calibration procedures complicate comparison between sites.
The (110) surface in the study of Aquino et al. [11], however, was terminated by OH functional groups, which complicates comparison.
The fact that EHEC and EPEC virulence genes are expressed at different growth stages complicates comparison of their regulation.
However, root growth is often inhibited by high concentrations of NH4+ but not of NO3− [6], which complicates comparison between these N sources.
A variety of different methods were used in these studies, complicating comparison among them.
During the 1990 s, the diabetes criteria were changed several times, which complicates comparison with earlier publications.
The difference in duration of complaints at baseline also complicates comparison between studies.
Additionally, the diverse populations under study and variations in methodology complicate comparison.
