Unrooted phylogenetic and molecular evolutionary analyses were constructed using MEGA4.0 by the neighbor-joining method with a Poisson correction model, using 1000 replicates for bootstrap analysis (Tamura et al. [2007]).
For the main analyses, boosted classification trees were constructed by MART® to identify non-redundant prognostic variables, which were then further analyzed by CART to identify thresholds that would define them as categorical variables.
HSA's were constructed by analysing discharge data of all acute care hospitals in Switzerland for the period of 2008 2010 [ 23, 24].
Phylogenetic analyses were performed and phylogenetic trees were constructed by using Mega 3.0 software (17, 18 ).
Haplotypes were constructed by Haploview version 3.2 [10].
Surrogates were constructed by shuffling these segments.
Plasmids were constructed by standard procedures [37].
Resultant graphic representations of such analyses have can been constructed by other investigators, which makes comparison between authors possible.
In addition to these separate logistic regression analyses, a blockwise structured model was constructed by adding the blocks of explanatory independent variables one by one.
Based on the results reported in the literature, the model is constructed by analysing the channels through which the electric energy is deposited.
