title: Letter to the editor: Authors' response.
authors.affiliation: Academic Center for Dentistry Amsterdam (ACTA), University of Amsterdam and VU University, Amsterdam, The Netherlands and Clinic for Periodontology, Utrecht, The Netherlands.
authors.forename: Dina
authors.initials: D
authors.lastname: Zandbergen
authors.forename: Dagmar E
authors.initials: DE
authors.lastname: Slot
authors.forename: Charles M
authors.initials: CM
authors.lastname: Cobb
authors.forename: Fridus A
authors.initials: FA
authors.lastname: Van der Weijden
mesh_terms: D010520:Aggressive Periodontitis / Q000628:therapy*; D000658:Amoxicillin / Q000008:administration & dosage* / Q000627:therapeutic use*; D000900:Anti-Bacterial Agents / Q000627:therapeutic use*; D000890:Anti-Infective Agents / Q000008:administration & dosage* / Q000627:therapeutic use*; D055113:Chronic Periodontitis / Q000188:drug therapy* / Q000628:therapy*; D012534:Dental Scaling; D006801:Humans; D008795:Metronidazole / Q000008:administration & dosage* / Q000627:therapeutic use*; D016745:Root Planing
chemical_list: D000900:Anti-Bacterial Agents; D000890:Anti-Infective Agents; D008795:Metronidazole; D000658:Amoxicillin