(The exact wordings used in specific questionnaires may deviate slightly due to the need to adapt the question according to the context of the questionnaire)
  
    |  |  |  | 
        TP0809c_07_q07 17-19/9/08
       |  | 
        TP0806c_07_q07 18-20/6/08 | 
  
    |  | 
        TP0803c_07_q07 18-20/3/08         |  | 
        TP0712c_07_q07 19-24/12/07
       |  | 
        TP0709b_07_q07 17-21/9/07        | 
  
    |  | 
        TP0706c_07_q07 15-21/6/07          |  | 
         TP0703bb_07_q07 19-21/3/07        |  |  | 
  
    |  | 
        TP0702c_07_q07 22-26/2/07          |  | 
        TP0701b_07_q07 22-26/1/07  
       |  | 
        TP0612c_07_q07 18-20/12/06  
       | 
  
    |  | 
        TP0611b_07_q07 20-24/11/06 
         |  | 
        TP0610b_07_q07 23-27/10/06 
       |  | 
        TP0609b_07_q07 14-20/9/06        | 
  
    |  | 
        TP0608c_07_q07 21-23/8/06          |  | 
        TP0607b_07_q07 14-21/7/06        |  | 
        TP0606b_07_q07 19-21/6/06        | 
  
    |  | 
        TP0605b_07_q07 18-25/5/06           |  | 
        TP0604b_07_q07 18-21/4/06         |  | 
        TP0603b_07_q07 13-17/3/06        | 
  
    |  |  |  | 
        TP0602c_07_q07 17-21/2/06        |  | 
        TP0601b_07_q07 16-20/1/06         | 
  
    |  | 
        TP0512c_07_q07 15-19/12/05 
         |  | 
        TP0511c_07_q07 18-23/11/05 
       |  | 
        TP0510c_07_q07 25-29/11/05  
       | 
  
    |  | 
        TP0509c_07_q07 26-29/9/05  
         |  | 
        TP0508c_07_q07 22-25/8/05         |  | 
        TP0507c_07_q07 25-29/7/05         | 
  
    |  | 
        TP0506c_07_q07 20-23/6/05         |  | 
        TP0505c_07_q07 21-24/5/05        |  | 
        TP0504c_07_q07 18-21/4/05        | 
  
    |  |  |  | 
        TP0502c_07_q07 17-20/2/05         |  | 
      TP0501c_07_q07 24-25/1/05    |