Table 1.

Geographic distribution of the RCTs and non-experimental studies included in the literature review

COUNTRY OF STUDYNO. OF STUDIES
Australia26,47,533
Cameroon501
Canada28,38,42,444
Finland7,212
France241
Italy181
Mexio19,342
Netherlands14,16,23,43,495
Sweden22,252
Taiwan33,452
Thailand321
UK13,15,20,27,35,396
US4,17,29,36,37,40,41,46,48,51,5211
  • RCT—randomized controlled trial, UK—United Kingdom, US—United States.