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Table 1 Suggested search strategy

From: What is the effect of phasing out long-chain per- and polyfluoroalkyl substances on the concentrations of perfluoroalkyl acids and their precursors in the environment? A systematic review protocol

 

Term 1

AND

Term 2

 

perfluor*

 

((trend OR variation) NEAR (time OR temporal))

OR

polyfluor*

OR

((change OR increase OR decrease) NEAR/5 (level or concentration))

OR

fluorotelomer*

OR

“time series”

OR

PF?S

OR

((snow OR ice OR sediment) NEAR (core OR column OR cap))

OR

PF?A

OR

archive*

OR

PFC

OR

“specimen bank”

OR

PFT

OR

“long-term monitoring”

OR

PFHxS

OR

”repeated measurements”

OR

FOSE

OR

historic*

OR

FOSA

  

OR

PAPS

  
  1. Search terms are connected with the Boolean operator AND, and words within each term is connected by OR. Truncation is denoted by *. Question mark is a wildcard that represents exactly one character.