Supplementary Table 1.

Specify the exact keywords searched in each database

Database	Title search	Subject search
WOS	TITLE: ((haemodialysis OR dialysis or “Renal Dialysis” OR hemodialysis) AND (paraquat OR gramoxone) AND (poisoning OR intoxication OR overdose OR toxicity) AND (survival OR death OR mortality OR fatality))	TOPIC: ((haemodialysis OR dialysis or “Renal Dialysis” OR hemodialysis) AND (paraquat OR gramoxone) AND (poisoning OR intoxication OR overdose OR toxicity) AND (survival OR death OR mortality OR fatality))
Scopus	TITLE ((haemodialysis OR dialysis OR “Renal Dialysis” OR hemodialysis) AND (paraquat OR gramoxone) AND (poisoning OR intoxication OR overdose OR toxicity) AND (survival OR death OR mortality OR fatality))	KEY ((haemodialysis OR dialysis OR “Renal Dialysis” OR hemodialysis) AND (paraquat OR gramoxone) AND (poisoning OR intoxication OR overdose OR toxicity) AND (survival OR death OR mortality OR fatality))
Proquest	Ti ((haemodialysis OR dialysis OR “Renal Dialysis” OR hemodialysis) AND (paraquat OR gramoxone) AND (poisoning OR intoxication OR overdose OR toxicity) AND (survival OR death OR mortality OR fatality)))	Su ((haemodialysis OR dialysis OR “Renal Dialysis” OR hemodialysis) AND (paraquat OR gramoxone) AND (poisoning OR intoxication OR overdose OR toxicity) AND (survival OR death OR mortality OR fatality))
Science direct	Title: ((haemodialysis OR dialysis OR “Renal Dialysis” OR hemodialysis) AND (paraquat OR gramoxone) AND (poisoning OR intoxication OR overdose OR toxicity) AND (survival OR death OR mortality OR fatality))	Title, abstract, keyords: ((haemodialysis OR dialysis OR “Renal Dialysis” OR hemodialysis) AND (paraquat OR gramoxone) AND (poisoning OR intoxication OR overdose OR toxicity) AND (survival OR death OR mortality OR fatality))
Springer	Title: ((haemodialysis OR dialysis OR “Renal Dialysis” OR hemodialysis) AND (paraquat OR gramoxone) AND (poisoning OR intoxication OR overdose OR toxicity) AND (survival OR death OR mortality OR fatality))	With all of the words: ((haemodialysis OR dialysis OR “Renal Dialysis” OR hemodialysis) AND (paraquat OR gramoxone) AND (poisoning OR intoxication OR overdose OR toxicity) AND (survival OR death OR mortality OR fatality))
PubMed	(haemodialysis[Title] OR dialysis[Title] OR “Renal Dialysis”[Title] OR hemodialysis[Title]) AND (paraquat[Title] OR gramoxone[Title]) AND (poisoning[Title] OR intoxication[Title] OR overdose[Title] OR toxicity[Title]) AND (survival[Title] OR death[Title] OR mortality[Title] OR fatality[Title])	(haemodialysis OR dialysis or “Renal Dialysis” OR hemodialysis) AND (paraquat OR gramoxone) AND (poisoning OR intoxication OR overdose OR toxicity) AND (survival OR death OR mortality OR fatality) [MeSH terms]
Embase	Title: ((haemodialysis OR dialysis OR “Renal Dialysis” OR hemodialysis) AND (paraquat OR gramoxone) AND (poisoning OR intoxication OR overdose OR toxicity) AND (survival OR death OR mortality OR fatality))	EMTree: ((haemodialysis OR dialysis OR “Renal Dialysis” OR hemodialysis) AND (paraquat OR gramoxone) AND (poisoning OR intoxication OR overdose OR toxicity) AND (survival OR death OR mortality OR fatality))
Cochrane library	(haemodialysis OR dialysis OR “Renal Dialysis” OR hemodialysis) AND (paraquat OR gramoxone) AND (poisoning OR intoxication OR overdose OR toxicity) AND (survival OR death OR mortality OR fatality) in Record Title	(haemodialysis OR dialysis OR “Renal Dialysis” OR hemodialysis) AND (paraquat OR gramoxone) AND (poisoning OR intoxication OR overdose OR toxicity) AND (survival OR death OR mortality OR fatality) in keyword