Acknowledgments— We are grateful to the
volunteers, who gave their time; to Dr. Jian’an
Luan, Susie Hennings, Sue Emms, and Ema
Lucia De Rolfe, who coordinated the study and
collected data; and to Kate Williams, who assisted
with the analysis of physical activity
data. The Medical Research Council (MRC),
U.K. provided funding for the MRC Ely Study