Reply to 'Body mass index and the risk of all-cause mortality among patients with nonvalvular atrial fibrillation: a multicenter prospective observational study in China; methodological issues'
1 Emergency and Intensive Care Center, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China.
2 Department of Cardiology, First Affiliated Hospital, Jinan University, Guangzhou, China.