Author Contributions: Drs Eder and Benjamin 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: Eder, Benjamin.
Acquisition of data: Eder, Dy, Notari, Benjamin.
Analysis and interpretation of data: Eder, Hillyer, Dy, Notari, Benjamin.
Drafting of the manuscript: Eder, Hillyer, Benjamin.
Critical revision of the manuscript for important intellectual content: Eder, Hillyer, Dy, Notari.
Statistical analysis: Eder, Dy, Notari.
Administrative, technical, or material support: Benjamin.
Study supervision: Hillyer, Benjamin.
Financial Disclosures: The authors are employed by the American Red Cross and received no separate compensation for their role in the study.
Funding/Support: The American Red Cross hemovigilance program is an ongoing quality assurance function and as such is supported by the organization; however, there was no separate funding for this study.
Role of the Sponsor: The American Red Cross did not have a role in the design and conduct of the study; collection, management, and interpretation of the data; and preparation, review, or approval of the manuscript.
Disclaimer: The opinions or assertions contained herein are the private ones of the authors and are not to be construed as official or reflecting the views of the American Red Cross.
Additional Contributions: Jean Kennedy, BSN, serves as case coordinator, American Red Cross hemovigilance program, American Red Cross National Headquarters, Washington, DC. The authors acknowledge the physicians and staff in the 9 regional American Red Cross donor centers for their daily commitment to blood collection and caring for blood donors without whom this study would not be possible. None of these individuals was compensated for their role in this study.