?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=D&rft.aulast=Stolfo&rft.au=Stolfo%2C+D&rft.date=January+2020&rft.issn=1879-0844&rft.atitle=Association+between+beta%E2%80%90blocker+use+and+mortality%2Fmorbidity+in+older+patients+with+heart+failure+with+reduced+ejection+fraction.+A+propensity+score%E2%80%90matched+analysis+from+the+Swedish+Heart+Failure+Registry&rft.title=European+Journal+of+Heart+Failure&rft.issue=1&rft.volume=22&rft.pages=103-112&rft.genre=article