Table 7.

Comparison of the duration of the included studies.

Study	Duration
Pradeep et al. [64]	6 weeks
Pradeep and Sharma [65]	6 weeks
Litkowski and Greenspan [66]	8 weeks
Ghassemi et al. [67]	Phase I: 8 weeks
	Phase II: 8 weeks
Kaufman et al. [68]	8 weeks