Manuscripts are sent out for review on the condition that any unpublished data cited within are properly credited and the appropriate permission has been sought. Where licenced data are cited, authors must include at submission a written assurance that they are complying with originators' data-licencing agreements. Referees are encouraged to be alert to the use of appropriated unpublished data from databases or from any other source, and to inform the editor of any concern they may have.
When discussing the published work of others, authors must properly describe the contribution of the earlier work. Both intellectual contributions and technical developments must be acknowledged as such and appropriately cited.