Echography Study_Anthropometric Measurements

The exploratory endpoints are as follows: * The skin-to-muscle distance (STMD) (mm) before and while applying a force on both anterolateral thighs, one shoulder (deltoid), and one upper arm (biceps and triceps) in the adult population and both anterolateral thighs in the pediatric population * The skin-to-bone distance (STBD) (mm) before and while applying a force on both anterolateral thighs, one shoulder (deltoid), and one upper arm (biceps and triceps) in the adult population and both anterolateral thighs in the pediatric population * The thickness of skin layers (mm) (thickness of dermis, thickness of hypodermis \[ie, subcutaneous fat\]) before and while applying a force on both anterolateral thighs, one shoulder (deltoid), and one upper arm (biceps and triceps) in the adult population and both anterolateral thighs in the pediatric population * The thickness of muscle layers (mm) before and while applying a force on both anterolateral thighs, one shoulder (deltoid), and one upper arm (biceps and triceps) in the adult population and both anterolateral thighs in the pediatric population