| Ref number | 
        Authors | 
        Methods | 
        NSAID | 
        Controls | 
       
      
        |   | 
        Year published | 
          | 
          | 
          | 
       
      
        | 4 | 
        Hayashi Y (2005) | 
        DBE | 
        11.5% (ileum/85.7%,    jejunum/14.3%) | 
         - | 
       
      
        | 7 | 
        Matsumoto T (2008) | 
        DBE | 
        51% | 
        5% | 
       
      
        | 8 | 
        Hayashi Y ( 2009) | 
        DBE | 
        100% (ileum/55.6%, duodenum    and/or jejunum/ 27.8%, both/5.6%) | 
         - | 
       
      
        | 9 | 
        Smecuol E (2009) | 
        CE | 
        50% | 
         - | 
       
      
        | 10 | 
        Endo H (2009) | 
        CE | 
        80% | 
        20% | 
       
      
        | 11 | 
        Maiden L ( 2009) | 
        CE | 
        68% | 
         - | 
       
      
        | 6 | 
        Caunedo-Alvarez A (2010) | 
        CE | 
        75% | 
        11.76% | 
       
      
        | 12 | 
        Tachecí I ( 2010) | 
        CE | 
        87.50% | 
         - | 
       
      
        | 13 | 
        Sidhu R (2010) | 
        CE | 
        80% | 
         - | 
       
      
        | 14 | 
        Fujimori S, 2010 | 
        CE | 
        60%denuded areas were    predominantly located in the proximal parterosions throughout the small    intestine and all ulcers in the distal part | 
         - | 
       
      
        |   | 
       
      
        |   | 
       
      
        | 3 | 
        Lim YJ, 2012 | 
        CE | 
        55-70% | 
         - | 
       
     
      Abbreviations 
    CE: capsule endoscopy 
    DBE: double-balloon endoscopy |