title: 'Doubling up' procedures in a protocol amendment. One size does not fit all.
authors.affiliation: Office of Regulatory Affairs, University of Pennsylvania, Philadelphia, PA, USA.
authors.forename: Troy
authors.initials: T
authors.lastname: Hallman
authors.forename: Lisa
authors.initials: L
authors.lastname: Panchella
mesh_terms: D035661:Animal Care Committees; D000827:Animal Welfare / Q000941:ethics* / Q000592:standards*; D000818:Animals; D000830:Animals, Laboratory / Q000601:surgery; D004285:Dogs / Q000601:surgery*; D007756:Laboratory Animal Science / Q000941:ethics / Q000592:standards; D012107:Research Design; D014481:United States