Intestinal villi (singular: villus)are tiny, finger-like projections that line the interior (lumen) of the small intestine. The primary function of villi is to absorb nutrients from food and transfer ...

These potential confounders were chosen a priori based on directed acyclic graphs generated for the outcome variable using DAGitty V.2.3 as a graphical tool for analysing the causal diagrams.18 The ...