Fig. (2)
Changes of analogous to Cobb angle between investigators, trials, and different positions (mean value in degrees) (NEU = neutral position; I
1
T
1
/I
1
T
2
: investigator: for trial 1 or 2; I
2
T
1
/I
2
T
2
: investigator 2 for trial 1 or 2).
