24 Jan 2019
// PR NEWSWIRE
https://www.prnewswire.com/news-releases/united-therapeutics-announces-closing-of-license-agreement-with-arena-pharmaceuticals-for-ralinepag-300784116.html
https://www.reuters.com/article/us-arena-pharma-utd-therapeut/united-therapeutics-to-develop-sell-arena-pharmas-hypertension-treatment-idUSKCN1NK1Q2
03 Oct 2018
// SEEKING ALPHA
https://seekingalpha.com/article/4209702-daily-pharma-scoop-cellectar-bio-shows-encouraging-early-data-arenas-ralinepag-posts-strong?ifp=0
29 Aug 2018
// PR NEWSWIRE
https://www.prnewswire.com/news-releases/arena-pharmaceuticals-presented-phase-1-clinical-data-for-ralinepag-in-pulmonary-arterial-hypertension-at-the-european-society-of-cardiology-300703538.html
12 Apr 2018
// PR NEWSWIRE
https://www.prnewswire.com/news-releases/arena-pharmaceuticals-announces-phase-2-data-presentation-for-ralinepag-in-pulmonary-arterial-hypertension-at-the-international-society-for-heart-and-lung-transplantation-annual-meeting-300628602.html
20 Mar 2018
// PR NEWSWIRE
https://www.prnewswire.com/news-releases/arena-pharmaceuticals-announces-proposed-public-offering-of-common-stock-300617070.html