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SHELDON H. PRESKORN, MD, is Professor, Department of Psychiatry, University of Kansas School of Medicine-Wichita, and Chief Executive Officer and Medical Director, Clinical Research Institute, Wichita, Kansas. He has more than 28 years of drug development research experience at all levels (i.e., preclinical through Phase IV) and has been a principal investigator on over 250 clinical trials including every antidepressant marketed in the United States over the last 20 years. Dr. Preskorn maintains a website at 〈www.preskorn.com〉 where readers can access previous columns and other publications. Adapted from Preskorn SH. "I don't see'em!" Journal of Practical Psychiatry and Behavioral Health 1997;3:302-7.
Sheldon Preskorn (Sat,) studied this question.