But while both the House and Senate bills aim to help the roughly 30 million Americans with no health care insurance, there are big differences in legislative language.

VOA: standard.2009.12.25

The paper's authors tried to take into account other factors, but they admit it may not have been entirely possible to quantify differences in, for example,the recipient's health, which can be a big factor in the success of a transplant.

VOA: standard.2010.07.14