{{Cite journal| doi = 10.1016/j.ejim.2021.06.024| issn = 1879-0828 (Electronic) 0953-6205 (Linking)| volume = 91| pages = 84| last1 = Ravioli| first1 = S.| last2 = Gygli| first2 = R.| last3 = Lindner| first3 = G.| title = The possibility of heart failure in patients with "Pneumonia" -Author's reply| journal = Eur J Intern Med| date = 2021-07-23| pmid = 34289954}}