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

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Text this: Effect of smartphone output power on the undetermined headache among high school students: Time-series study