Thanks, Dave, and good afternoon, everyone. As Dave commented, our strong first quarter results demonstrate our continued momentum and points of continued market share gains. Our focused on driving execution, along with our long standing commitment to innovation and technology have positioned us well as we work to fully emerge from the impacts of COVID-19. This is evidenced in our first quarter sales, profitability and cash flow growth. Q1 revenue was $227.3 million growing 19.3% as reported, and 20.7% on a day adjusted basis, compared to the first quarter of 2014. Revenue grew 18.7% on a constant currency basis, as compared to the first quarter of 2020. Though we experienced COVID impacts in January and early February, revenue grew sequentially each month and accelerated as we move further into February and March. Net income was $45.3 million and non-GAAP net income was $49.7 million driving $0.49 of fully diluted non-GAAP earnings per share. Adjusted EBITDA was 35.2% and our free cash flow was $49.9 million. Moving further into sales, US revenue was $193.3 million, or 22% higher than the first quarter of 2020 driven by the continued strength of our US Spine business, as well as higher INR revenue stemming from additional capital sales. International revenue for the quarter was $34 million, representing a 5.9% increase versus the first quarter of 2020. As Dave noted earlier, international implant sales were essentially flat. However, growth in robotics was the key contributing factor in our year-over-year improvement. We continue to see strong implant growth in most of our international markets. However, this is being partially offset by declines in Japan, driven by our previously discussed salesforce transition. First quarter gross profit was 75.8% compared to 74.4% in Q1 of 2020. The improvements to gross profit were driven mainly by improved manufacturing efficiencies and lower warehouse costs. The lower warehouse costs were primarily labor related as the result of a warehouse move, which occurred in the prior year quarter and did not repeat in the prior year quarter. Our research and development expenses for the quarter were $14.9 million or 6.6% of sales, compared to $15.4 million or 8.1% of sales in the first quarter of the prior year. The reduced spending was driven primarily by lower travel, lower meeting expenses and lower consulting costs. This lower spending is partially offset by higher salary and benefit costs driven by increased headcount. Looking ahead, we plan to increase our investment in R&D as we progress through 2021. Those investments will continue to drive our class-leading capabilities across robotics and spines will also positioning us to further penetrate the trauma and joint markets. SG&A expenses for the first quarter were $97.9 million, or 43.1% of sales compared to $93.5 million, or 49.1% of sales, driven primarily by higher sales compensation costs, partially offset by lower travel, entertainment and meeting expenses as well as leverage on our spending as a result of the higher sales volumes. The effective income tax rate for the quarter was 20.7% in line with expectations, though slightly higher than the 20.2% rate in the first quarter of 2020. As I mentioned earlier, adjusted EBITDA for the quarter was 35.2% as reflected in my earlier comments, specifically around revenue growth, gross profit improvement and overall leverage. We ended our first quarter with $838.4 million of cash, cash equivalents and marketable securities. Net cash provided by operating activities was $63.6 million, and free cash flow was $49.9 million as mentioned earlier. At this time, the company is revising its previously announced 2021 guidance of $880 million in net sales, and $1.83 in fully diluted non-GAAP EPS. We now expect full year net sales to be $925 million, and our non-GAAP EPS to be $1.89 representing 17.2% revenue growth, and 31.3% non-GAAP EPS growth versus 2020. Looking back on our strong Q1 results, and our expectations for the remainder of the year, we remain well positioned to aggressively execute across all fronts. We continue to be extremely positive about our business and its ability to take share across our entire portfolio, all while bringing new and exciting products to market. This coupled with our commitment to expanding R&D investments, while aggressively pursuing acquisitions that complement our portfolio will position us for continued growth over the long term, and drive exceptional shareholder value. I truly feel the best is yet to come. We will now open the call for questions.