Operator Good afternoon, ladies and gentlemen, and welcome to the Acceleron First Quarter 2021 Earnings Conference Call. [Operator Instructions] I would now like to hand the call over to Ms. Jamie Bernard, Associate Director of Investor Relations at Acceleron. Please go ahead. Jamie A. Bernard -- Associate Director of Investor Relations Thanks, and welcome, everyone, to our first quarter 2021 earnings call. The press release reporting our financial results in addition to the presentation for today's webcast are available on the Investors & Media page of our corporate website at www.acceleronpharma.com. Joining me on the call this afternoon are Habib Dable, our Chief Executive Officer; Kevin McLaughlin, our Chief Financial Officer; Dr. Jay Backstrom, our Head of Research and Development; Sujay Kango, our Chief Commercial Officer; and Todd James, our Senior Vice President of Corporate Affairs and Investor Relations. As a reminder, we will be making forward-looking statements regarding our financial outlook in addition to regulatory, product development and commercialization plans and research activities. These statements are subject to risks and uncertainties that may cause actual results to materially differ from those forecasted. A description of these risks can be found in our most recent Form 10-K on file with the SEC. In addition, today's discussion will include references to several non-GAAP financial measures, which are adjusted to exclude certain items. Reconciliations of these non-GAAP financial measures to the most comparable GAAP measures are available in today's press release on our website and at the Appendix of today's presentation. With that, I would now like to turn the call over to Habib Dable, our CEO.