@incollection{Azevedo12, author = {Ana Azevedo}, title = {Clinical Epidemiology: Principles Revisited in an Approach to Study Heart Failure}, booktitle = {Epidemiology}, publisher = {IntechOpen}, address = {Rijeka}, year = {2012}, editor = {Nuno Lunet}, chapter = {10}, doi = {10.5772/32074}, url = {https://doi.org/10.5772/32074} }