Influenza vaccination in patients with heart failure: a systematic review and meta-analysis of observational studies
Bárbara Sucena Rodrigues, Cláudio David, João Costa, Joaquim J Ferreira, Fausto J Pinto, Daniel Caldeira
Heart Mar 2020, 106 (5) 350-357; DOI: 10.1136/heartjnl-2019-315193