FUTON Bias. Or Why Limiting to Free Full Text Might not Always be a Good Idea.
Connotea Imports 2012-07-31
Summary:
"[L]imiting [a research project] to free full text (FFT) papers in PubMed might lead to bias: picking “low hanging fruit of convenience” might mean that the paper isn’t representative and/or doesn’t reflect the current best evidence...."