Nat Struct Mol Biol. 2007 Apr;14(4):251. doi: 10.1038/nsmb0407-251.
Publishers have varying policies as to when published articles become freely available to the public, but it seems that within any one publishing group the free access policy should be the same for all authors.
对于已发表文章何时向公众免费开放，出版商有不同的政策，但似乎在任何一个出版集团内部，对所有作者的免费访问政策应该是相同的。
