title: Response to "Level 2 Observational Studies: A Practical Alternative to Randomized Trials in Plastic Surgery".
authors.affiliation: Dr Eaves is a Professor of Surgery, Division of Plastic Surgery, Emory University; Medical Director of the Emory Aesthetic Center and Emory Ambulatory Surgery Center, Atlanta, Georgia; and Evidence-Based Medicine Section Co-editor for Aesthetic Surgery Journal. Dr Thoma is Clinical Professor, Division of Plastic Surgery, Department of Surgery; Associate Member, Department of Clinical Epidemiology and Biostatistics, McMaster University, Hamilton, Ontario, Canada; and Evidence-Based Medicine Section Co-editor for Aesthetic Surgery Journal.
authors.forename: Felmont F
authors.initials: FF
authors.lastname: Eaves
authors.affiliation: Dr Eaves is a Professor of Surgery, Division of Plastic Surgery, Emory University; Medical Director of the Emory Aesthetic Center and Emory Ambulatory Surgery Center, Atlanta, Georgia; and Evidence-Based Medicine Section Co-editor for Aesthetic Surgery Journal. Dr Thoma is Clinical Professor, Division of Plastic Surgery, Department of Surgery; Associate Member, Department of Clinical Epidemiology and Biostatistics, McMaster University, Hamilton, Ontario, Canada; and Evidence-Based Medicine Section Co-editor for Aesthetic Surgery Journal.
authors.forename: Achilleas
authors.initials: A
authors.lastname: Thoma
mesh_terms: D019274:Botulinum Toxins, Type A / Q000008:administration & dosage*; D005260:Female; D006801:Humans; D009465:Neuromuscular Agents / Q000008:administration & dosage*; D012629:Sebum / Q000378:metabolism*; D015595:Skin Aging / Q000187:drug effects*
chemical_list: D009465:Neuromuscular Agents; D019274:Botulinum Toxins, Type A