أرسل هذا في رسالة قصيرة: Prevalence and correlates of back pain or problems among a nationally representative population-based sample of older adults in India in 2017-2018

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