Table 3. Internal validity (methodological and parasitological) of included trials.

Trial	Methodological Assessment (Jadad Score)§				Parasitological Assessment¥
	Randomized€?	Double-Blinded?®	A Description of Withdrawals or Dropouts?	Total Jadad Score	Description	Adequate	Repeated	Interobserver	Total
Alizadeh, 2006 [39]	1	0	1	2	2	0	3	0	5
Yereli, 2004 [41]	1	0	1	2	2	8	3	0	13
Karabay, 2004 [40]	1	0	1	2	2	0	3	0	5
Rodríguez-García, 1996 [44]	1	0	0	1	2	3	3	0	8
Misra, 1995 [29]	1	0	1	2	2	3	3	0	8
Romero-Cabello, 1995 [42]	1	0	1	2	2	3	3	0	8
Dutta, 1994 [45]	1	0	1	2	2	0	3	0	5
Hall, 1993a,b [43]	2	0	1	3	2	4	3	0	9

§Range 0–5 (5 exemplifies articles with the highest quality).

¥Range 0–15, (15 indicates most optimal diagnostic procedure employed).

€Represents generation of allocation sequence.

®Represents allocation concealment.