With some delay, TRAILS data are made available to researchers outside the TRAILS consortium. The availability of TRAILS data is communicated through DANS EASY (https/easy.dans.knaw.nl). These data are available without costs, but not freely accessible; access can be obtained by submitting a publication proposal. Providing that the proposed publication does not overlap with other TRAILS publications, permission to use the data requested is given for a period of 1 year, and automatically withdrawn if the manuscript has not been submitted for publication within that period. TRAILS data that have not yet been released for use by external researchers are subject to additional demands and costs. More information and a publication proposal form can be obtained via the website (trails@umcg.nl) or the corresponding author (A.J.O.). Please note that TRAILS adopts a publication bias prevention policy, which implies that all research questions and hypotheses specified in the publication proposal should be included in the manuscript, regardless of the significance of the findings.
