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Schematic illustration of assays based on the structure-switching aptamer strategies for the detection of veterinary drugs. (a) Assays based on FRET (figure created based on ref. [52,98]). (b) Assays based on LRET (figure created based on ref. [99]). (c) Assays based on gated release of dyes from MSNs (figure created based on ref. [36]).
