Vitamin D Supplements and Prevention of Cancer and Cardiovascular Disease 
JoAnn E. Manson, M.D., Dr.P.H., Nancy R. Cook, Sc.D., I-Min Lee, M.B., B.S., Sc.D., William Christen, Sc.D., Shari S. Bassuk, Sc.D., Samia Mora, M.D., M.H.S., Heike Gibson, Ph.D., David Gordon, M.A.T., Trisha Copeland, M.S., R.D., Denise D’Agostino, B.S., Georgina Friedenberg, M.P.H., Claire Ridge, M.P.H., Vadim Bubes, Ph.D., Edward L. Giovannucci, M.D., Sc.D., WalterC. Willett, M.D., Dr.P.H., and Julie E. Buring, Sc.D., for the VITAL Research Group*
n engl j med 380;1 nejm.org January 3, 2019
http://doi.org/10.1056/NEJMoa1809944