Difficulties in designing randomised controlled trials of vitamin D supplementation for reducing acute cardiovascular events and in the analysis of their outcomes

• Barbara J. Boucher,
• William B. Grant

Affiliations

Barbara J. Boucher

Corresponding author.; Blizard Institute, Barts & The London School of Medicine & Dentistry, Queen Mary University of London, 2-4 Newark Street, London E12AT, UK

William B. Grant

Sunlight, Nutrition, and Health Research Center, P.O. Box 641603, San Francisco, CA 94164-1603, USA