Variables in the Danish Hernia Databases: inguinal and ventral

Department of Surgery, Herlev Hospital, Herlev, Denmark; University of Copenhagen, København, Denmark; Department of Surgery, Horsens Hospital, Horsens, Denmark; Department of Surgery, Bispebjerg Hospital, København, Denmark Contributions: (I) Conception and design: All authors; (II) Administrative support: None; (III) Provision of study materials or patients: None; (IV) Collection and assembly of data: All authors; (V) Data analysis and interpretation: All authors; (VI) Manuscript writing: All authors; (VII) Final approval of manuscript: All authors. Correspondence to: Jacob Rosenberg. Department of Surgery, Herlev Hospital, Herlev, Denmark. Email: Jacob.rosenberg@regionh.dk.