treatment visit patient_id score1   score2;
  1        1       1      6.8496     1.3007
  1        2       1     14.7009    14.4018
  1        3       1      8.9982     2.9965
  1        1       2      7.5940     0.1880
  1        2       2     14.2160    13.4321
  1        3       2     14.6928    14.3855
  2        1       3     10.4298     5.8596
  2        2       3     10.3169     5.6338
  2        3       3      5.4979     4.0041
  2        1       4      5.6657     3.6687
  2        2       4     13.1932    11.3864
  2        3       4     10.2387     5.4774
  2        1       1     13.5339    12.0679
  2        2       1      5.6718     3.6563
  2        3       1     14.5702    14.1405
  2        1       2      7.9719     0.9439
  2        2       2      7.7261     0.4522
  2        3       2     11.8993     8.7986
  1        1       3     14.7676    14.5353
  1        2       3      7.2651     0.4698
  1        3       3     11.8824     8.7647
  1        1       4      9.1276     3.2553
  1        2       4     10.5855     6.1711
  1        3       4      7.8723     0.7445