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Table 1 Evidence retrieved on web search engines: quantitative analysis of the first 2 pages of Google and Yahoo

From: Reiki and related therapies in the dialysis ward: an evidence-based and ethical discussion to debate if these complementary and alternative medicines are welcomed or banned

Search terms Search engine Items Commercial/non-commercialsites in the first 2 pages Sites providing references (non-commercial links in the first 2 pages) No. sites in common in Google and Yahoo
Reiki Google 58500000 6/14 3 6
Yahoo 44900000 6/14 6
Reiki medicine Google 17800000 17/3 2 1
Yahoo 5690000 19/1 1
Reiki Torino Google 3680000 18/2 0 0
Yahoo 51100 10/10 0
Reiki use Google 3060000 18/2 2 0
Yahoo 55300 20/0 0
Reiki pain Google 10700000 1/19 9 4
Yahoo 7150000 2/18 4
Reiki dialysis Google 590000 4/16 0 7
Yahoo 193000 6/14 0
Reiki cost effectiveness Google 333000 12/8 12 5
Yahoo 112000 15/5 9
Reiki contra- indications Google 120000 9/11 2 9
  Yahoo 30900 6/14 1  
  1. Legend: * number of links retrieved in first 2 pages in Google and Yahoo.