| Groups | 
        Number    of cases | 
        Positive    Expression (%) | 
        Intensity    of staining (%)  | 
       
      
        |   | 
          | 
          | 
        + | 
        ++ | 
        +++ | 
       
      
        | F0 | 
        11 | 
        8 (73) | 
        8 (73) | 
        4 (36) | 
        0 | 
       
      
        | F1 | 
        13 | 
        13 (100) | 
        13 (100) | 
        2 (15) | 
        0 | 
       
      
        | F2 | 
        18 | 
        18 (100) | 
        17 (94) | 
        8 (44) | 
        4 (22) | 
       
      
        | F3 | 
        13 | 
        13 (100) | 
        13 (100) | 
        6 (46) | 
        2 (15) | 
       
      
        | F4 | 
        23 | 
        23 (100) | 
        22 (95) | 
        13 (56) | 
        6 (26) | 
       
      
        | NP | 
        11 | 
        5 (45) | 
        5 (45) | 
        0 | 
        0 | 
       
      |