TABLE 1.

Keywords used in article search

Search number	PICOS component	Search terms (BOOLEAN operator OR)
1	Population	Child, children, babies, baby, infant
2	Intervention	Sick, disease, illness, disability, congenital anomaly, cleft lip, childhood cancer, syndrome, sick children, child with disability
N/A	Comparator	N/A
3	Outcomes	Breastfeeding, breast feeding, breastmilk, human milk, EBM
4	Study design and setting	(Any design, any country) hospital, PICU, paediatrics, paediatrics