@ARTICLE{HellerSchnell2007,
author = {GŁnther Heller and Rainer Schnell},
title = {{\lbrack Letter to the editor\rbrack{ }Hospital} mortality risk adjustment using claims data},
year = {2007},
journal = {Journal of the American Medical Association},
volume = {297},
number = {18},
pages = {1983},
url = {http://jama.ama-assn.org/cgi/content/extract/297/18/1983}
}