發送短信 : Assessment of Contamination and Misclassification Biases in a Randomized Controlled Trial of a Social Network Peer Education Intervention to Reduce HIV risk Behaviors Among Drug Users and Risk Partners in Philadelphia, PA and Chiang Mai, Thailand

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