Table A3.

Example search strategy using MEDLINE database.

#	Search
1	((child* or adolescen* or teenage* or young or youth* or girl* or boy* or young human*) adj8 (work* or employ* or labo?r* or occupation*)).m_titl.
2	exp Child Labor/
3	1 or 2
4	(Chemical* or toxi * or acid* or poison* or cleaning agent* or clean* or metal* or heavy metal* or lead* or arsenic* or mercury* or cadmium* or chromium* or nickel* or manganese* or fluoride* or hydrofluoric* or hydrochloric* or chlori* or ammonia* or bleach* or pesticide* or fumigant* or fungicide* or rodenticide* or insecticide* or herbicide* or agrochemical* or agriculture* or carbamate* or organochloride* or organophosphate* or OPP or chlorpyrifos* or parathion-methyl* or aldicarb* or terbuphos* or phorate* or edifenphos* or methamidophos* or malathion* or metam sodium* or methyl bromide* or paraquat* or parathion* or pentachlorophenol* or warfarin* or methomyl* or inorganic* or organic* or solvent* or hexane* or benzene* or ethanol* or oil* or diesel* or petrol* or fuel* or paint thinner* or turpentine* or toluene* or nicotine* or tobacco* or carbon monoxide* or tetrachloroethylene* or persistent organic pollutant* or POP or chlorinated hydrocarbon* or polychlorinated biphenyl* or PCB or polybrominated diphenyl ether* or PBDE or dichlorodiphenyldichloroethylene* or DDE or dichlorodiphenyltrichloroethane* or DDT or phthalate* or bisphenol* or perfluorinated compound* or aldrin*).mp. [mp=title, abstract, original title, name of substance word, subject heading word, floating sub-heading word, keyword heading word, organism supplementary concept word, protocol supplementary concept word, rare disease supplementary concept word, unique identifier, synonyms]
5	exp Pesticides/ or exp Solvents/ or exp Metals, Heavy/ Cadmium Poisoning/ or Organophosphate Poisoning/ or Heavy Metal Poisoning/ or Lead Poisoning/ or Manganese Poisoning/ or Mercury Poisoning/ or Poisoning/
6	4 or 5
7	3 and 6 (1071 records found)
8	(child* or adolescen* or teenage* or young or youth* or girl* or boy* or young human*).m_titl.
9	exp Occupational Diseases/ or exp Occupational Exposure/
10	4 and 8 and 9 (636 records found
11	(Factory or Factories or Agricultur* or Mining or Mine or Street* or Workshop* or Industr* or Dump* or Scavenger* or Manufactur).mp. [mp=title, abstract, original title, name of substance word, subject heading word, floating sub-heading word, keyword heading word, organism supplementary concept word, protocol supplementary concept word, rare disease supplementary concept word, unique identifier, synonyms]
12	8 and 9 and 11 (417 records found)

Total records found from MEDLINE database: 2124.