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. 2018 Feb 13;49(3):621–631. doi: 10.1016/j.bjm.2017.12.005

Table 2.

The experimental design and RSM results.

The experiment number A B C DH (%)
1 0 0 0 25.71
2 0 0 0 26.52
3 0 1 1 9.05
4 1 0 −1 23.69
5 0 −1 −1 22.52
6 1 1 0 11.34
7 −1 1 0 11.71
8 −1 0 −1 20.49
9 1 0 1 14.7
10 0 1 −1 9.05
11 −1 0 1 18.3
12 0 0 0 25.8
13 1 −1 0 22.09
14 0 0 0 24.01
15 −1 −1 0 15.01
16 0 0 0 25.68
17 0 −1 1 9.05