https://investor.ironwoodpharma.com/press-releases/press-release-details/2015/Ironwood-Pharmaceuticals-Initiates-Phase-I-Clinical-Study-of-sGC-Stimulator-IW-1973/default.aspx
https://investor.ironwoodpharma.com/press-releases/press-release-details/2015/Ironwood-Pharmaceuticals-Initiates-Phase-I-Clinical-Study-of-sGC-Stimulator-IW-1973/default.aspx