發送短信 : Methods for health surveys in difficult settings: Charting progress, moving forward

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