Mosholder Andrew D, Mathew Justin, Alexander John J, Smith Harry, Nambiar Sumathi
Office of Surveillance and Epidemiology, Division of Epidemiology II, Center for Drug Evaluation and Research, Food and Drug Administration, Silver Spring, MD, USA.
N Engl J Med. 2013 May 2;368(18):1665-8. doi: 10.1056/NEJMp1302726.