أرسل هذا في رسالة قصيرة: Bone-specific heparan sulfates induce osteoblast growth arrest and downregulation of retinoblastoma protein

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