Author Contributions: Drs Leichsenring and Rabung had full access to all of the data in the study and take responsibility for the integrity of the data and the accuracy of the data analysis.
Study concept and design: Leichsenring, Rabung.
Acquisition of data: Leichsenring, Rabung.
Analysis and interpretation of data: Leichsenring, Rabung.
Drafting of the manuscript: Leichsenring, Rabung.
Critical revision of the manuscript for important intellectual content: Leichsenring, Rabung.
Statistical analysis: Leichsenring, Rabung.
Administrative, technical, or material support: Leichsenring, Rabung.
Financial Disclosures: None reported.
Additional Contributions: We thank Jacques Barber, PhD (Department of Psychiatry, University of Pennsylvania), John Clarkin, PhD (Weill Medical College of Cornell University, New York), Louis Diguer, PhD (Department of Psychology, University of Laval, Québec), Ivan Eisler, PhD (Institute of Psychiatry, King's College London, England), Dorothea Huber, MD, PhD (Department of Psychosomatic Medicine, Technical University Munich, Germany), Paul Knekt, PhD (National Public Health Institute, Helsinki, Finland), William Lamb, PhD (University of California at Berkeley), William Piper, PhD (Department of Psychiatry, University of British Columbia, Vancouver), Sydney Pulver, MD (Department of Psychiatry, University of Pennsylvania), Frank Petrak, DSc (Department of Psychosomatic Medicine, University of Bochum, Germany), Rolf Sandell, PhD (Department of the Behavioural Sciences, Linköping University, Stockholm, Sweden), Martin Svartberg, MD, PhD (Department of Psychiatry, Mount Sinai Hospital, Toronto), and Alexander Wilczek, MD, PhD (Department of Clinical Neuroscience, Karolinska Institute, Stockholm, Sweden) for information about their studies. None of these individuals received compensation for their support.