init info on demo

Author: alistairewj

demo/README.md

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+# eICU Collaborative Research Database Demo
+
+eICU-CRD is a large multi-center database of over 200,000 critical care admissions for 140,000 unique patients admitted to hospitals in the United States. All data were collected during routine patient care.
+
+Due to the sensitive nature of the data, the full dataset requires the signing of a data use agreement and completion of the "Data or Specimens Only" CITI course. The course usually takes 2-3 hours, and verification takes up to one week. You can read more about how to access eICU-CRD online: http://eicu-crd.mit.edu/gettingstarted/access/
+
+To encourage use of the data, a small subset (~1% of patients) is made fully publicly available. A random 50 patients were selected from 20 hospitals in the eICU-CRD. There are two recommended methods for working with the data:
+
+1. An SQLite file is attached as supplemental material. This is a lightweight database file which can be opened by a number of applications. Below we include instructions on how to install a program, "DB Browser for SQLite", which allows easy navigation of the data.
+2. A set of comma separated value files on PhysioNetWorks. Access to this data is done via this link: https://physionet.org/works/eICUCollaborativeResearchDatabaseDemo/files/
+
+# Installing DB Browser for SQLite
+
+DB Browser for SQLite is a high quality, visual, open source tool to create, design, and edit database files compatible with SQLite.
+We have found this tool to be useful for navigating SQLite files. Installation is fairly straightforward.
+
+Instructions to install the tool are available online: http://sqlitebrowser.org/
+
+# Load SQLite file
+
+Once DB browser is installed and launched, the database file can be accessed by clicking "Open Database" and navigating to the eicu-crd-demo.sqlite3 file (you will have to extract the sqlite3 file from the zip file you downloaded using any appropriate decompression software).