https://investor.ironwoodpharma.com/press-releases/press-release-details/2012/Ironwood-and-AstraZeneca-Announce-Linaclotide-Collaboration-for-China/default.aspx
https://investor.ironwoodpharma.com/press-releases/press-release-details/2012/Ironwood-and-AstraZeneca-Announce-Linaclotide-Collaboration-for-China/default.aspx