Table 2.

Number of participants per study (n=70).

Range for the number of participants	Studies, n (%)	Studies
1-10	15 (21)	[54-56,63,77,82,83,89,95,97,98,100,108,109,115]
11-20	19 (27)	[52,53,58-61,66,74-76,87,88,92,96,99,103,104,110]
21-30	12 (17)	[49,57,64,67-69,72,73,90,102,107,114]
31-40	5 (7)	[71,79,84,94,105]
41-50	5 (7)	[48,65,80,91,101]
51-100	5 (7)	[51,78,106,111,113]
>100	9 (13)	[47,50,62,70,81,85,86,93,112]