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  _  _      ___      ______   _    _    ______   
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 |  ' ||  / //\ \\  `-| |,-  | || | || |  --  // 
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 `-` -`  `-`   `-`    `-`'     `---`   `------`

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Text this: Blood cholinesterase activity levels of farmers in winter and hot season of Mae Taeng District, Chiang Mai Province, Thailand