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

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Text this: Reference ranges of myocardial performance index from 12 to 40 weeks of gestation