title: Addendum from Portugal--how about an annotated IFFS surveillance for the millennium?
authors.forename: A
authors.initials: A
authors.lastname: Barros
authors.forename: M
authors.initials: M
authors.lastname: Sousa
mesh_terms: D015925:Cryopreservation; D004622:Embryo, Mammalian; D004992:Ethics, Medical; D006801:Humans; D007391:International Cooperation; D011174:Portugal; D012042:Registries / Q000592:standards*; D012099:Reproductive Techniques / Q000592:standards*