Operator: Good day, ladies and gentlemen and welcome to the First Quarter 2013 Laboratory Corporation of America Holdings Earnings Conference Call. My name is Janeda and I will be your operator for today. At this time all participants are in a listen-only mode. Later, we will conduct a question-and-answer session. As a reminder, this conference is being recorded for replay purposes.
I would now like to turn the call over to, Mr. David King, Chairman and Chief Executive Officer. Please proceed.
David P. King - Chairman and CEO: Thank you. Good morning and welcome to LabCorp's first quarter 2013 conference call. Joining me today from LabCorp are Brad Hayes, Executive Vice President and Chief Financial Officer; (Ed Dodson), Senior Vice President and Chief Accounting Officer; and Steve Anderson, Vice President, Investor Relations.
This morning we will discuss our first quarter 2013 financial results, reaffirm our 2013 guidance, highlight our progress on our five-pillar strategy, and provide answers to several frequently asked questions.
I'd now like to turn the call over to Steve Anderson who has a few comments before we begin.
Stephen Anderson - VP, IR: Before we get started, I would like to point out that there will be a replay of this conference call available via the telephone and Internet. Please refer to today's press release for replay information. This morning the Company filed a Form 8-K that included additional information on our business and operations. This information is also available on our website. Analysts and investors are directed to this 8-K and our website to review this supplemental information.
Additionally, we refer you to today's press release, which is available on our website for a reconciliation of non-GAAP financial measures discussed during today's call to GAAP. These non-GAAP measures include adjusted EPS, adjusted EPS excluding amortization, free cash flow, and adjusted operating income. I would also like to point out that we are making forward-looking statements during this conference call. These forward-looking statements include among others, statements about our expected financial results, the implementation of our business strategy and the ongoing benefits from acquisitions.
These statements are based upon current expectations and are subject to change, based upon various factors that could affect the Company's financial results. Some of these factors are set forth in detail in our 2012 10-K and subsequent filings. The Company has no obligation to provide any update to these forward-looking statements, even if our expectations change.
Now Brad Hayes will review our financial results.
William B. Hayes - EVP and CFO: Thank you, Steve. On today's call I will review four key measures of our financial performance; cash flow, revenue growth, margin and liquidity. I will also reaffirm our 2013 guidance. First, cash flow; our cash flow remains strong. Free cash flow for the trailing 12 months ended March 31, 2013, was $661.2 million. DSO at the end of March was 50 days, an increase of two days year-over-year. During the quarter, our bad debt remained 4.3%.