Thanks Matt. Good afternoon everyone. Thank you for joining today's call. I'm pleased to speak with you today on my first quarterly conference call as Apollo CEO. We're off to a great start to the year. On the call, we will discuss Apollo's third straight quarter posting robust sales growth. But first, I'd like to take the time to share our strategy to transform the company into a market leader in the field of therapeutic endoscopy. In recent weeks, many of you are asked me why I decided to join Apollo. I follow the company for many years. I know the founding CEO and some of the company's original venture capital investors. For years I've been impressed with Apollo's long held vision to build an entirely new field of therapeutic endoscopy as well as the company's remarkable technical innovation, most notably the OverStitch devices. I'm also familiar with the ups and downs that the company has faced since its formation 15 years ago. And so with that understanding of the history that I'm thrilled to be joining Apollo at such a pivotal time as we transform into a market leading growth company. I believe that we have a distinctive, differentiated product portfolio that advances minimally invasive endoscopic surgery, and helps GI and bariatric professionals, enhance the standard-of-care, potentially for millions of patients around the world. At times, the words pivotal and transformational can be so overused in the business community that they lose their meaning. When I was approached about the CEO role, I did my homework on the company's products, procedures, and prospects with three different product lines, all of which have very attractive growth opportunities. I believe that we can fundamentally change the trajectory of this business to delivering consistent, sustainable growth over the years ahead. And that is what I mean, when I use the word pivotal, though now we're at a pivotal point. To me, transformational reflects the impact that we can have on patient care, with continued advances in technology development, such as our recent clearance of X-Tack and more comprehensive market development efforts for ESG, and the use Orbera for patients with NASH, we have the opportunity to address very large market opportunities. More than 100 million people in the United States, 100 million adults in the United States are obese. More than 20 million colonoscopies are performed each year. More than 10 million patients suffer from NASH and have a BMI between 30 and 40. And these are only the US figures. We are a global company. By targeting these populations, we have the potential to increase the scale of patients who may benefit from our technologies from thousands per year to potentially hundreds of thousands per year or more. That is transformational. To achieve our goals, I envision three phases for Apollo to execute our strategy and deliver transformational growth. I call these three phases, energize, accelerate and lead from the front. We've included a new slide in our investor deck, describing these three phases. As you will see from our Q1 results that we announced today, the energize phase is well underway. The energize phase is all about building momentum, by driving near term growth over the next several quarters and achieving strategic milestones that, I believe, will lay the foundation for years of sustainable growth. Near term growth opportunities include continued development of our overseas franchise, scaling our X-Tack launch in the US, steady execution of our IGB franchise, and recovery in some of our OUS markets that continue to see impacts from COVID-19. Yesterday, we announced the appointment of two new commercial leaders, who will join Apollo next week. Kirk Ellis and Steve Bosrock rock are both experienced customer focused leaders, who will increase our capabilities and enhance our execution during this energize phase. In addition, we plan to make targeted additions to our sales team to support our growth aspirations. We anticipate several company milestones during the energize phase, starting with the release of the MERIT study results. MERIT is a randomized control trial of the ESG procedure and a cornerstone of our plans to pursue a new indication for ESG and develop it into a potentially market-leading weight-loss procedure. More on that in a minute. Another key milestone will be defining the clinical pathway required to take advantage of or Orbera’s breakthrough designation to treat patients with NASH. The current standard of care, offers NASH patients very limited prospects for recovery. And that's a key reason why we received the breakthrough designation. A well designed clinical study, focused on achieving a new indication for Orbera for patients with NASH, offers great promise to these patients and our balloon franchise. Phase two is accelerate and it builds on the growth engines that, through continued expansion of X-TACK tech and increased OverStitch utilization, and then layers in the potential for more widespread adoption of the ESG procedure. In particular, following the release of the MERIT study results, and assuming that these results are in line with prior clinical studies of ESG, we will leverage them to pursue new indications -- the new ESG indication, as well as reimbursement in the US and in key markets around the world. And then, finally in phase three, lead from the front, I see Apollo as a market leader by: one, positioning X-Tack as the standard of care for a range of large closer needs across the GI tract; two, continue to develop ESG into a market leading weight-loss procedure; three, expanding the approval of Orbera to include the treatment of NASH; and four, continuing to innovate through a strong R&D pipeline that advances the field of therapeutic endoscopy. And I believe that delivering on these three phases will position Apollo for exciting sustainable growth over many years. The near-term opportunities will contribute in 2021 and 2022. The key priorities in Phase 2 and 3 that I've described will take some time to unfold. And we are putting the plans in place now to ensure we maximize the sizable market opportunities. And so allow me to elaborate more on the first phase of our transformation, the energized phase. And I want to share some of the things that I've learned in my first 60 days that have me so excited about the path ahead, starting with OverStitch and the growth in Endoscopic Suturing. In my travels, talking to customers, I've consistently heard that OverStitch is a one of a kind product that gets excellent reviews from our customers. A number of physicians have told me that OverStitch is the tool that they use to differentiate their clinical practice. And OverStitch sales have been growing at 25% to 30% per year, primarily based on two factors. Existing users continue to increase their use of the product, and new users who have gone through our medical education programs, and subsequently incorporate OverStitch into their clinical practice. OverStitch has a wide range of potential applications in therapeutic endoscopy, including stent fixation and repairs of dissections, resections and perforations. But the ESG procedure stands out as an application that can have the -- that can help and impact the greatest number of patients. ESG has the potential to offer a unique value proposition of efficacy, safety and convenience for patients. Clinical results to date have demonstrated clinically meaningful weight loss, via incisionless, reversible anatomy sparing procedure. Furthermore, ESG procedures require shorter hospital stays and have faster recovery times compared to typical bariatric surgeries. Importantly, only 1% of indicated patients currently undergo bariatric surgeries. Physicians tell us that ESGs are often performed on patients who are not good surgical candidates, or who already decided they don't want surgery. And as a result, ESG has the potential to address a major unmet clinical need for patients who are not well-served by existing approaches. The MERIT study is a key milestone in the path forward for ESG. Independent investigators have completed the 12-month follow-up, and they are working on the initial publication and presentation of the outcomes. We anticipate a publication of the study in the second half of 2021. Once MERIT is published and assuming these results are in line with previous studies of ESG, we intend to pursue a label expansion to cover real primary ESG procedures and bariatric revision procedures. If successful, a new indication would enable Apollo to promote the ESG procedure, provide physician education and training programs to a broader group of practitioners, and initiate programs to increase patient awareness of the benefits of ESG. The MERIT study will also be central in our efforts to secure reimbursement coding, coverage and payment, both in the U.S. and in markets around the world. The investment will likely be a multi-year process that will unfold the following the publication of MERIT results, which was essential for some pair benefit in 2022, and then continued progress in subsequent years. Building on the success of OverStitch, our ESS franchise now has a second growth driver an X-Tack, adding an adjacent new market opportunity that is a strong complement to our existing OverStitch business. X-Tack is unique with a wide range of applications in both the upper and the lower GI. Physicians are already applying it in a wide range of GI tract closures, ranging from relatively simple closures, such as polyp removal to highly complex irregular geometries or standard TTS clips, simply don't get the job done. Results from early cases using X-Tack, have been compelling and that is driving a lot of enthusiasm for the product. Our initial X-Tack customers are primarily current users of OverStitch. Given X-Tack shorter learning curve, ease of use and wide variety of both upper GI app – and lower GI applications, we anticipate that the user base for X-Tack will expand. At the end of Q1, we have introduced X-Tack, in almost 50 accounts, a nice increase from the nine accounts who participated in our initial limited launch. These accounts are providing important insights into how best to scale our launch and increase utilization. In March, we sponsor our first X-Tack educational webcast, hosted by Dr. Andrew Storm from the Mayo Clinic. More than 150 physicians joined the webcast and participated for a full two hours in discussions about the applications for X-Tack. The level of engagement from the participants was a great indication that this product is capturing the interest of our target audience. A recording of the webinar is now available on X-Tack.com. We continue to advance our launch in the second quarter. We will continue to advance the launch in the second quarter, and the rest of 2021 with a keen eye for creating effective education tools, introducing X-Tack in a new centers, driving adoption in buildings sustainable use patterns. Our sales team has been focused on expanding access to X-Tack and we are managing a new account pipeline and potential orders that are working their way to hospital procurement processes and is worth a total of more than $1 million in potential sales. Turning to IGB, the Orbera Balloon has been a very solid franchise for Apollo, and it's potentially an underappreciated asset. IGB is still a very important customer need for weight loss solutions that are less invasive than current bariatric surgical options, but more effective than diet and exercise alone. The 41% year-on-year worldwide growth that we have seen with the IGB franchise is an excellent testament to the strength of this product line. That said, in a few years, I believe that, we will look back on Q1, 2021 and say that, the strategic positioning of Orbera was fundamentally changed based off events of this quarter. My very first day on the job, we announced FDA breakthrough designation for the treatment of patients with NASH and this is a validation of the strategies developed over the past several years to position IGB therapy as an effective clinical treatment options for medical conditions. We are working on the next steps to maximize the benefits of this designation, including designing a clinical trial that will be required to pursue label expansion. We are in discussions with FDA and CMS about the trial design and we hope to have an approved trial by the end of the year. We also receive notification that the American Medical Association assigned new Category I CPT Codes for IGB procedures. It was interesting to learn that 6 separate physician organizations supported the efforts, demonstrating widespread support in the community. In addition – we're pleased to see that the American Gastroenterological Association, the AGA has for the first time, issued practice guidelines, recommending the use of IGB for appropriate patients. Taking together, these three developments enhance the value of the IGB franchise. And then turning to Q1 performance, I'm very pleased with here – with the team here at Apollo, and their work that has resulted in a very positive start to 2021. Even with some lingering effects of COVID and a smaller team in place versus the prior year, we've achieved 29% revenue growth over Q1 2020, driven by 26% growth ESS and 41% growth in IGB. And we believe that our first quarter results provide a solid foundation for the year ahead. It's an exciting time at Apollo. I look forward to leveraging all three of our product lines to energize the business that accelerate growth over time, and ultimately lead the field of therapeutic endoscopy. And with that, I'll turn the call over to Stefanie to cover the first quarter financial results in greater detail. Stef?