Author Contributions: Dr Bischoff-Ferrari had
full access to all of the data in the study and takes responsibility for the
integrity of the data and the accuracy of the data analysis.
Study concept and design: Bischoff-Ferrari,
Willett, Giovannucci, Dawson-Hughes.
Acquisition of data: Bischoff-Ferrari, Dietrich.
Analysis and interpretation of data: Bischoff-Ferrari,
Willett, Wong, Giovannucci, Dietrich, Dawson-Hughes.
Drafting of the manuscript: Bischoff-Ferrari,
Critical revision of the manuscript for important
intellectual content: Bischoff-Ferrari, Willett, Wong, Giovannucci,
Statistical analysis: Bischoff-Ferrari, Willett,
Wong, Giovannucci, Dietrich, Dawson-Hughes.
Obtained funding: Bischoff-Ferrari.
Administrative, technical, or material support:
Financial Disclosures: Dr Wong receives funding
from federal agencies, Schering Plough, and Centocor for work unrelated to
studies of vitamin D or falls and fractures. No other authors reported financial
Funding/Support: This study was supported by
grants from the Medical Foundation (Charles H. Farnsworth Trust; US Trust
Company; Trustee and the Charles A. King Trust; Fleet National Bank) and the
James Knox Memorial Foundation.
Role of the Sponsors: No sponsors participated
in the design and conduct of the study; in the collection, analysis, and interpretation
of the data; or in the preparation, review, or approval of the manuscript.