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 __   _    _    _     ____       ___      ______  
| || | || | || | ||  |  _ \\    / _ \\   /_____// 
| '--' || | || | ||  | |_| ||  | / \ ||  `____ `  
| .--. || | \\_/ ||  | .  //   | \_/ ||  /___//   
|_|| |_||  \____//   |_|\_\\    \___//   `__ `    
`-`  `-`    `---`    `-` --`    `---`    /_//     
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Text this: Role of drowsy driving in traffic accidents: A questionnaire survey of Thai commercial bus/truck drivers