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Table 3 Distribution of subjects in study groups in articles where allocation procedure was not specified

From: The effect of spinal manipulative therapy on experimentally induced pain: a systematic literature review

Article

Total of subjects

SMT groups

Control group

No treatment

[23]

60

30

30

30

[39]

30

10

10

10

[19]

10

?

?

?

[31]

15

7

8

-

[33]

18

?

?

?

[30]

50

19

18

13

[32]

24

?

?

?

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Chiropractic & Manual Therapies

ISSN: 2045-709X