Department of Internal Medicine, University of Iowa, Iowa City, USA.|Department of Internal Medicine, University of Iowa, Iowa City, USA.|Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, China.|Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, China.|Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, China.|Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, China.|Department of Internal Medicine, University of Iowa, Iowa City, USA.