Table 2.

Relevant references selected for the developing systems

Subpopulation	Developing systems	Relevant references (from retrieved references)
Infants	Physiology of the gut Metabolic and excretory capacities relevant for the elimination of chemicals Nervous system, including brain and brain barriers Immune system Male and female reproductive and endocrine systems	8 (33) 7 (43) 24 (108) 12 (112) 6 (47)
Young children	Physiology of the gut Metabolic and excretory capacities relevant for the elimination of chemicals Nervous system, including brain and brain barriers Immune system Male and female reproductive and endocrine systems	17 (169) 30 (155) 50 (426) 21 (476) 18 (291)