Large variation in cohort genotypic composition may also be explained by large annual variation in size and composition of winter aggregations (and concomitant variation
in population breeding structure).
The application of this psychophysical methodology (what he called "concomitant variation
") to the problem of perceptual meaning can be illustrated by Michotte's landmark investigations of the perception of causality.
Clinical implications of concomitant variations
of the testicular, suprarenal and renal veins: a case report.
We as anatomists believe that the concomitant variations
of these type are be kept in mind by the surgeon while operating on carcinoma head of pancreas, during manipulation of the diaphragm and in cases of kidney transplantations.
He describes the five basic principles of induction which have come to be known as Mill's Methods--the method of agreement, the method of difference, the joint or double method of agreement and difference, the method of residues, and the method of concomitant variations
. The common feature of these methods, the one real method of scientific inquiry, is that of elimination.
In a recent review, we identified more than 20 studies on consistent associations, dose-effect relationships, and concomitant variations
, all supporting a causal relationship between antimicrobial-drug use and MRSA (2).