أرسل هذا في رسالة قصيرة: Motivation for smoking cessation among drug-using smokers under methadone maintenance treatment in Vietnam

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