NYHA

Tjam, Erin Y., Heckman, George A., Smith, Stuart, Arai, Bruce, Hirdes, John, Poss, Jeff, McKelvie, Robert S. 2012. Predicting heart failure mortality in frail seniors: Comparing the NYHA functional classification with the Resident Assessment Instrument (RAI) 2.0. International Journal of Cardiology. 155 (1) 75-80.