Operator
Operator
Good morning. My name is Ben and I will be the conference operator today. At this time, I would like to welcome everyone to the United Therapeutics Corporation Fourth Quarter and annual 2011 financial results earnings Conference Call. All lines have been placed on mute to prevent any background noise. After the speakers’ remarks, there will be a question and answer session. [Operator Instructions]. Remarks today concerning United Therapeutics will include forward-looking statements, which represent United Therapeutics' expectations or beliefs regarding future events based on current assumptions. United Therapeutics cautions that such statements involve risks and uncertainties that may cause actual results to differ materially from those in the forward-looking statements. Consequently, all such forward-looking statements are qualified by the cautionary language and risk factors set forth in United Therapeutics' periodic and other reports filed with the SEC. There can be no assurance that the actual results, events or developments referenced in such forward-looking statements will occur or be realized. United Therapeutics assumes no obligation to update these forward-looking statements to reflect actual results, changes and assumptions or changes in factors affecting such forward-looking statements. Thank you. Dr. Rothblatt, you may begin your conference.