title: [Twenty years means nothing...!].
authors.forename: R
authors.initials: R
authors.lastname: Matesanz
mesh_terms: D009398:Nephrology; D010506:Periodicals as Topic / Q000706:statistics & numerical data / Q000639:trends; D011643:Publishing / Q000706:statistics & numerical data / Q000639:trends; D013030:Spain; D013997:Time Factors