Impact of FUTON and NAA bias on visibility of research.

Objective: To determine whether availability of journals on MEDLINE as FUTON (full text on the Net) affects their impact factor.

Material And Methods: A comprehensive search identified 324 cardiology, nephrology, and rheumatology/immunology journals on-line until May 2003. The status of these journals was ascertained in MEDLINE as having FUTON, abstracts only, and NAA (no abstract available).