Table 3.

Characteristics of excluded studies

Reason for exclusion	Articles
Ineligible population (n = 28)	[42–70]
Ineligible outcome (n = 33)	[71–104]
Ineligible type of study (n = 38)	[105–143]
Not the original article (n = 8)	[19, 20, 144–150]
Ongoing study (n = 1)	[151]