Fig. 1

Steps in the registration process of PROSPERO4animals. After preparing their protocol, authors submit it to the admin team, who check the content and make the decision to reject it, register it as is, or refer it back to the author for revisions. After registration of the first version, authors may submit amendments to their protocol at any time. The admin team will check the content, after which the amendment will either be sent back to the authors for revisions, or be registered as a time-stamped, updated version of the protocol, supported by revision notes explaining the changes made