Thanks to medical research we now have many treatments for Crohn's disease; unfortunately, we don't know which ones are better than others (comparative effectiveness) and in whom they're most likely to work (precision medicine). No one (least of all drug companies) wants to pay for a randomized trial pitting drugs against each other. So let's use the raw data from all the trials to answer the question. This has never been done before in the gastroenterology/inflammatory bowel disease field.

Spring 2020
Public Health