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Two ways in. The difference is what we hold about you — choose before you type anything.

Anonymous registration No email, no password, no name. You get an access code, and that code is the account.

We hold nothing that could identify you — which also means nothing can be recovered if you lose the code. Your comments are reviewed by a moderator before they appear.

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Signed registration For authors. Needed to reply to a concern about your own paper under your own name.
  1. 1 Publication
  2. 2 Author
  3. 3 Email

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First and last authors of papers in our index can create an account. Paste a DOI, PubMed ID or arXiv ID from one of your own papers. If we don't hold it yet, we'll fetch it from Crossref, PubMed or arXiv.

No suitable publication but you still need an account? Contact the moderators.

Either way, comments are posted under an assigned pseudonym unless you choose otherwise. Already registered? Sign in.