ID	Search	Items found
#13	#12 Indexes=SCI‐EXPANDED, SSCI, A&HCI, CPCI‐S, CPCI‐SSH, BKCI‐S, BKCI‐SSH, ESCI, CCR‐EXPANDED, IC Timespan=1990‐2018	5,077
#12	#10 AND #9 AND #1 Refined by: DOCUMENT TYPES: (ARTICLE OR CORRECTION OR REVIEW OR RETRACTED PUBLICATION OR PROCEEDINGS PAPER) Indexes=SCI‐EXPANDED, SSCI, A&HCI, CPCI‐S, CPCI‐SSH, BKCI‐S, BKCI‐SSH, ESCI, CCR‐EXPANDED, IC Timespan=1975‐2018	5,084
#11	#10 AND #9 AND #1 Indexes=SCI‐EXPANDED, SSCI, A&HCI, CPCI‐S, CPCI‐SSH, BKCI‐S, BKCI‐SSH, ESCI, CCR‐EXPANDED, IC Timespan=1975‐2018	5,174
#10	TS=(time OR timing OR moment OR duration OR age OR month OR months OR early OR week OR weeks OR year OR years OR day OR days) Indexes=SCI‐EXPANDED, SSCI, A&HCI, CPCI‐S, CPCI‐SSH, BKCI‐S, BKCI‐SSH, ESCI, CCR‐EXPANDED, IC Timespan=1975‐2018	14,434,421
#9	#8 OR #7 Indexes=SCI‐EXPANDED, SSCI, A&HCI, CPCI‐S, CPCI‐SSH, BKCI‐S, BKCI‐SSH, ESCI, CCR‐EXPANDED, IC Timespan=1975‐2018	7,402
#8	TS=((full OR fully OR exclusiv*) NEAR (“breast milk” OR “human milk” OR “maternal milk” OR breastmilk OR “mother* own milk”) AND (fed OR feeding* OR diet OR intake)) Indexes=SCI‐EXPANDED, SSCI, A&HCI, CPCI‐S, CPCI‐SSH, BKCI‐S, BKCI‐SSH, ESCI, CCR‐EXPANDED, IC Timespan=1975‐2018	890
#7	TS=((Exclusiv* OR fully OR full) NEAR/5 (breastfeed* OR “breast feed*” OR breastfed OR “breast fed*” OR lactat*)) Indexes=SCI‐EXPANDED, SSCI, A&HCI, CPCI‐S, CPCI‐SSH, BKCI‐S, BKCI‐SSH, ESCI, CCR‐EXPANDED, IC Timespan=1975‐2018	6,994
#6	#5 Indexes=SCI‐EXPANDED, SSCI, A&HCI, CPCI‐S, CPCI‐SSH, BKCI‐S, BKCI‐SSH, ESCI, CCR‐EXPANDED, IC Timespan=1990‐2018	5,324
#5	#3 AND #2 AND #1 Refined by: DOCUMENT TYPES: (ARTICLE OR REVIEW OR REPRINT OR PROCEEDINGS PAPER OR CORRECTION OR BOOK REVIEW) Indexes=SCI‐EXPANDED, SSCI, A&HCI, CPCI‐S, CPCI‐SSH, BKCI‐S, BKCI‐SSH, ESCI, CCR‐EXPANDED, IC Timespan=All years	5,329
#4	#3 AND #2 AND #1 Indexes=SCI‐EXPANDED, SSCI, A&HCI, CPCI‐S, CPCI‐SSH, BKCI‐S, BKCI‐SSH, ESCI, CCR‐EXPANDED, IC Timespan=All years	5,466
#3	TS=((introduction OR introduce* OR introducing OR start OR beginning OR milestone*) NEAR (time OR timing OR moment OR duration OR age OR month OR months OR early OR week OR weeks OR year OR years OR day OR days)) Indexes=SCI‐EXPANDED, SSCI, A&HCI, CPCI‐S, CPCI‐SSH, BKCI‐S, BKCI‐SSH, ESCI, CCR‐EXPANDED, IC Timespan=All years	489,108
#2	TS=(diet OR nutrition OR food* OR wean* OR feeding OR beikost OR IYCF OR “partial breastfeeding” OR “partial breastfeeding” OR “non‐exclusive breastfeeding” OR “non‐exclusive breastfeeding” OR “mixed breastfeeding” OR “mixed breastfeeding” OR fruit* OR vegetable* OR cereal* OR wheat OR gluten OR egg* OR peanut* OR fish OR shellfish OR porridge OR rice OR meat OR bread OR juice OR corn OR puree* OR solid* OR “spoon‐fed” OR meal*) Indexes=SCI‐EXPANDED, SSCI, A&HCI, CPCI‐S, CPCI‐SSH, BKCI‐S, BKCI‐SSH, ESCI, CCR‐EXPANDED, IC Timespan=All years	4,066,938
#1	TS=(infan* OR “young child*” OR baby OR babies OR “early childhood” OR weanling* OR “first year of life” OR “early life” OR ((“pre school” OR preschool OR kindergar*) NEAR (child* OR “age” OR “aged”))) Indexes=SCI‐EXPANDED, SSCI, A&HCI, CPCI‐S, CPCI‐SSH, BKCI‐S, BKCI‐SSH, ESCI, CCR‐EXPANDED, IC Timespan=All years	626,719