發送短信

數:

提供者:

CAPTCHA:

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

Please enter what you see:

發送短信 : Epidemiology, investigation, management, and outcome of headache in emergency departments (HEAD study)-A multinational observational study