Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Jane E. Wilcox and Gregg C. Fonarow and Clyde W. Yancy and Nancy M. Albert and Anne B. Curtis and J. Thomas Heywood and Patches Johnson Inge and Mark L. McBride and Mandeep R. Mehra and Christopher M. O'Connor and Dwight Reynolds and Mary Norine Walsh and Mihai Gheorghiade,Factors associated with improvement in ejection fraction in clinical practice among patients with heart failure: Findings from IMPROVE HF,American Heart Journal,0002-8703,Elsevier BV,2012-01,163,1,49-56.e2,https://cir.nii.ac.jp/crid/1363388843694364672,https://doi.org/10.1016/j.ahj.2011.10.001