However, the regional variation documented in the current study is not an isolated finding; the pattern of regional variation in intensity of end-of-life care is consistent.
In efforts to rein in health care costs, policy makers will need to consider both small area variation – often reflecting local, institutional or practice patterns that lead to variation – and regional variation as documented in the current study.
These variations are complex, making it difficult to form a complete picture as to their nature; however, the major variations are documented in the results.
If intrinsic drivers of genetic variation exist in inbreeding plant species, have additional incidents of cryptic genetic variation been documented in other systems?
In general, it is possible that the huge practice variation well documented in contemporary medicine [ 56- 61], can be, in part, due to individual differences in subjective judgments of disease prevalence and "thresholds" at which physicians act.
The major axis of variation documented here in the cross-sectional adult study (PC1RC) appears to correspond to the major axis we observed differentiating remote Berber villagers from urban Moroccans using basically the same leukocyte sampling strategy [19].
Significant differences in morphology, germination patterns and genetic variation documented between wild, in situ managed and cultivated populations of the species studied are associated with higher frequencies of phenotypes favoured by humans in managed populations.
Indeed, the lack of score sensitivity to task variation is well documented in the language testing research.
This semiannual variation is well documented in both ground-based and previous satellite observations (Vincent et al. 1998; Fritts and Isler 1994; Hays and Wu 1994; Burrage et al. 1995; McLandress et al. 1996; Zhang et al. 2006).
These results are of strikingly consistency given the variability arising from different laboratories performing the measurements and the naturally occurring variation in activity documented in blood samples (de Lustig et al., 1993; Borchelt et al., 1994; Robberecht et al., 1994).
