Nature Precedings
Nature precedings is a free online service from NPG that enables researchers in the life sciences to openly share preliminary findings, solicit community feedback, and claim priority over discoveries by posting preprint manuscripts, white papers, technical reports, posters, and presentations. Started in 2007, it includes materials from biology, medicine (except clinical trials), chemistry and the earth sciences. Nature Precedings ceased accepting new submissions as of April 3rd, 2012. The full archive of existing content remains freely accessible at this site and will be maintained by NPG