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             ___                 ___      _  __  
    ___     / _ \\    ____      / _ \\   | |/ // 
   /   ||  / //\ \\  |    \\   / //\ \\  | ' //  
  | [] || |  ___  || | [] ||  |  ___  || | . \\  
   \__ || |_||  |_|| |  __//  |_||  |_|| |_|\_\\ 
    -|_|| `-`   `-`  |_|`-`   `-`   `-`  `-` --` 
     `-`             `-`

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Text this: Blood cholinesterase levels among agricultural workers in four Asian countries