Table 1.

Keywords for searching relevant studies

Database	Keywords	Customization	Items found
PubMed	(“e-waste” OR “*WEEE” OR “electronic waste”) AND workers AND health AND problems (“e-waste” OR “*WEEE” OR “electronic waste”) AND workers AND health AND problems AND informal AND recycling (“e-waste” OR “*WEEE” OR “electronic waste”) AND workers AND health AND problems AND recycling	Timeframe: 1/01/2010 to 1/01/2018Language: English	181
Web of Science	(“e-waste” OR “*WEEE” OR “electronic waste”) AND workers AND health AND problems (“e-waste” OR “*WEEE” OR “electronic waste”) AND workers AND health AND problems AND informal AND recycling (“e-waste” OR “*WEEE” OR “electronic waste”) AND workers AND health AND problems AND recycling	Timeframe: 1/01/2010 to 1/01/2018Language: EnglishFields-3 fields	45
Science Direct	(“e-waste” OR “*WEEE” OR “electronic waste”) AND workers AND health AND problems (“e-waste” OR “*WEEE” OR “electronic waste”) AND workers AND health AND problems AND informal AND recycling (“e-waste” OR “*WEEE” OR “electronic waste”) AND workers AND health AND problems AND recycling	Timeframe: 1/01/2010 to 1/01/2018Language: EnglishAll article typePublication Title (Waste Management, Environmental Pollution, Journal of Hazardous Material	231
Total			457

*WEEE-Waste Electrical and Electronic Equipment