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Table 1 Results of the literature search, and exclusions from the selected sample

From: Questions asked and answered in pilot and feasibility randomized controlled trials

MEDLINE/EMBASE search Number of papers
1 pilot.ti 40741
2 feasibility.ti 16179
3 1 or 2 56430
4 limit 3 to randomized controlled trial 7553
5 limit 4 to english language 7398
6 limit 5 to humans 7348
7 limit 6 to yr = "2000 - 2009" 5965
8 remove duplicates from 7 3581
RANDOM SAMPLE OF PAPERS  
Papers randomly selected from 8 75
EXCLUDED PAPERS (n = 25)  
Remove cross-over trials (n = 14) 61
Remove trials with only one arm (n = 1) 60
Remove historically controlled trials (n = 2) 58
Remove non-randomized trials (n = 2) 56
Remove letters (n = 1) 55
Remove brief reports (n = 1) 54
Remove study protocols (n = 1) 53
Remove review articles (n = 1) 52
Remove articles where 'pilot' or 'feasibility' in the trial did not relate to the trial (n = 2) 50