The concept of disease has traditionally been representing the main focus of medicine and center of care. In fact, the clinical decision process largely relies on the diagnosis, treatment, and prevention of the individual's nosological conditions [1]. Nowadays, such paradigm tends to growingly seem inadequate. In fact, the aging of the population renders quite unusual the manifestation of a standalone disease, whereas the condition of multimorbidity (i.e., the co-occurrence of multiple diseases in one same person) becomes the normality [2].
