¹

http://www.ccs.neu.edu/home/hafner/

²

http://www.ccs.neu.edu/home/wiegand/

³

http://www.ldavolio.org/

⁴

https://www.i2b2.org/NLP/Medication/

⁵

http://www.ccs.neu.edu/home/jaa/

⁶

This example is from mock data following the format of the original. The original is protected under a non-disclosure agreement.

⁷

http://www.ccs.neu.edu/home/rraj/