Michael B. First, MD is a Professor of Clinical Psychiatry in the Columbia Department of Psychiatry, and has worked closely with MSD throughout the development of the ICD-11. Dr. First has extensive experience with both the DSM and ICD design and conceptualization. In 2008, Dr. First was invited to conduct a complete comparison of DSM-IV and ICD-10. By 2009, thirty percent of his professional responsibilities were devoted to the ICD revision. Dr. First was co-principal investigator on the “Future of Psychiatric Diagnosis” conferences that developed research agendas for the then upcoming DSM-5 and ICD-11 revisions. Additionally, Dr. First has been very active in the discussion of harmonization between the DSM and the ICD.