That is, the stepwise methods are essentially a forward selection procedure, but at each stage the possibility of deleting a variable, as in backward elimination, are considered.
The relationship between Plaid and the SNP is key because Plaid have put centre stage the possibility of the nationalist parties and the Greens holding the balance of power in the event of a hung parliament.
However, we cannot rule out at this stage the possibility that either one or both populations used fire for ecosystem management in ways that did not significantly affect the natural fire trend.
At this stage, the possibility of interactions between sIL-6R and other not yet identified factors cannot be excluded and the situation in vivo seems to be more complex.
Limitations include the higher number of missing data (especially for CD4 cell counts/percentages, height, weight, and WHO stage), the possibility of data errors, as well as a high probability of underreporting deaths (20), as is typical for routine data.
We agree that at this stage, the possibility of alternative A-domain configurations playing a role in MCM regulation/activity is not tested, but we feel that the definitive demonstration of an alternative A-domain orientation in a MCM hexamer is sufficiently intriguing to be described in detail.
