Count NIH-funded papers that use PhysioNet/MIMIC resources

[tompollard]

We would like to get a rough estimate of the number of published papers (and perhaps also grants etc) that are:

1. funded by the NIH and specifically the National Heart, Lung, and Blood Institute (NHLBI) and
2. use PhysioNet resources such as MIMIC.

We may need to search paper metadata and the paper itself (e.g. funding/acknowledgments section) for funding information. Citation of PhysioNet papers/projects may be our only realistic way of estimating "use of PhysioNet resources".