ID	Search	Items found
#1	[mh ^Infant] or infan*:ti,ab,kw or young child*:ti,ab,kw or baby:ti,ab,kw or babies:ti,ab,kw or early childhood:ti,ab,kw or weanling*:ti,ab,kw or “first year of life”:ti,ab,kw or “early life”:ti,ab,kw	59,821
#2	(Exclusiv*:ti,ab,kw or fully:ti,ab,kw or full:ti,ab,kw) near/5 (breastfeed*:ti,ab,kw or breast feed*:ti,ab,kw or breastfed:ti,ab,kw or “breast fed”:ti,ab,kw or lactat*:ti,ab,kw)	927
#3	(Exclusiv*:ti,ab,kw or fully:ti,ab,kw or full:ti,ab,kw) and [mh “breast feeding”]	564
#4	(full:ti,ab,kw or fully:ti,ab,kw or exclusiv*) and (“breast milk”:ti,ab,kw or “human milk”:ti,ab,kw or “maternal milk”:ti,ab,kw or “mother's own milk”:ti,ab,kw) and (fed:ti,ab,kw or feeding*:ti,ab,kw or diet:ti,ab,kw or intake:ti,ab,kw)	464
#5	#2 or #3 or #4	1,234
#6	(time:ti,ab,kw or timing:ti,ab,kw or moment:ti,ab,kw or duration:ti,ab,kw or age:ti,ab,kw or month:ti,ab,kw or months:ti,ab,kw or early:ti,ab,kw or week:ti,ab,kw or weeks:ti,ab,kw or year:ti,ab,kw or years:ti,ab,kw or day:ti,ab,kw or days:ti,ab,kw or [mh “Time factors”] or [mh ^”Age Factors”])	690,281
#7	#1 and #5 and #6	1,052
#8	#7 Publication Year from 1990	1,007