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  ______    _____    _    _     _____     _____   
 /_   _//  |  ___|| | \  / ||  |  ___||  / ____|| 
   | ||    | ||__   |  \/  ||  | ||__   / //---`' 
  _| ||    | ||__   | .  . ||  | ||__   \ \\___   
 /__//     |_____|| |_|\/|_||  |_____||  \_____|| 
 `--`      `-----`  `-`  `-`   `-----`    `----`

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Text this: The chemical composition of gallstones: Its relevance to surgeons in Southeast Asia