Table 1: Experimental situations submitted to each two volunteers, randomly.

Sequence

T1

T2

T3

T4

A

1

2

3

4

B

4

3

2

1

C

2

4

3

1

D

1

3

2

4

E

2

1

4

3

F

4

3

1

2

T1 - Treatment 1; T2 - Treatment 2; T3 - Treatment 3; T4 - Treatment 4.