Number needed to call in emergency care research: Postenrollment follow-up data from a multicenter prospective syncope study

Affiliations

• ¹ Department of Emergency Medicine, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand.
• ² Department of Emergency Medicine, University of California Davis, Sacramento, California, USA.
• ³ Department of Emergency Medicine, University of Rochester Medical Center, Rochester, New York, USA.
• ⁴ Department of Emergency Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, USA.
• ⁵ Department of Emergency Medicine, Icahn School of Medicine at Mount Sinai, New York City, New York, USA.
• ⁶ Department of Emergency Medicine, Columbia University Irving Medical Center, New York City, New York, USA.