Thank you, Vlad. First, let me say how thrilled I am to be here for todayâs call. As many of you have seen, Iâve joined the Biohaven team in early December right off the heels of the company announcing an incredible strategic collaboration with Pfizer, enabling us to gain access to their industry-leading expertise and global footprint to turbocharge global commercialization efforts for rimegepant. Iâve been following Biohavenâs progress for many years while I was at Foresite, and I couldnât be more enthusiastic about the opportunity to join this incredible team, especially at a time like this as I look at the opportunities in front of us. Some of the guiding principles that Iâve incorporated in my role from learnings during the transition of my predecessor, Jim Engelhart are threefold: maximizing value for shareholders is top of mind, ensuring weâre adequately capitalized, limiting dilution for shareholders whenever possible. This was and will continue to be a critical focus for us. This dovetails into the next key tenant of our strategy, which is ultimately getting to a place of profitability. This is critical for us, ensuring we are well-positioned to realize long-term revenue streams. We have obviously made tremendous inroads since the launch of our dual acute prevention label, and we see strong growth as we eventually pursue more of the extension opportunities for NURTEC and pediatric migraine pain adjacencies and other non-migraine indications. And finally, maintaining that steadfast financial discipline while continuing to ensure we are driving access to new patient starts, investing wisely in a brand that is still relatively new in a market that only continues to grow rapidly. These are the critical components of our strategy, and I look forward to sharing more updates in the months ahead as we make progress. So with that in mind, let me take you through some of the financial highlights from the past year. The press release we issued this morning contains details of our financial results for the fourth quarter of 2021 with further details in our 10-K, which should be filed shortly. And rather than read through all these details, my comments will focus on some key financial results. NURTEC ODT achieved net sales of $190 million in Q4, demonstrating another quarter of strong performance, increasing 40% versus Q3 and increasing 440% year-over-year, driven largely by increased sales volume in NURTEC ODT and expanded and improved managed care reimbursement. The oral CGRP market continues to grow at an exceptional pace, carving out a small but expanding market share for migraine drugs while generating almost â generating over $1 billion in revenues last year. In total, oral CGRP market revenues grew greater than 400% for the full 2021 year, while Biohaven grew revenues over 600%. As the market continues to grow, we expect to see higher-than-market rates from growth for the oral class of CGRPs as well as for Biohaven. In the fourth quarter, we benefited from a large and growing market, which supported higher volume, and in addition, we had some favorable seasonality, which impacted us in a few ways. Higher volume and net price as payer constraints on patients such as deductibles and coinsurance were largely satisfied, resulting in reduced co-pay systems for Biohaven. This is in addition to direct efforts we made to encourage refills. We also experienced favorable payer mix with lower rebate payers. And as we discussed the influence of positive seasonal factors as well as market growth in our Q4 results during webcast presentations and investor meetings as well as last year on our year-end earnings call. Many of these favorable contributors we experienced in Q4 are typical and expected a patient supportive pharma program, and they pull back along with the typical seasonal changes anticipated in Q1, and it could have an impact on volume as well as sequential revenues. Now as we go down the P&L, R&D investment in the quarter on a non-GAAP basis was $76.4 million, compared to $57.8 million in the prior quarter, an increase of $18.6 million or 32%. The increase is primarily due to continued finding a post-approval international and pipeline expansion spending for rimegepant as well as our late-stage product candidates, including zavegepant, troriluzole and verdiperstat, which combined with the vast majority of our spend. SG&A expense in the quarter on non-GAAP basis was $189.3 million, compared to $114 million in the prior quarter, an increase of the prior year quarter â an increase of $75.3 million or 66%. Most of our SG&A costs continue to support commercial sales of NURTEC ODT as we invest behind our novel dual indication therapy with less than 50% of our spend on personnel costs and the rest supporting our promotional spend. Now moving on to full year 2021 results. NURTEC ODT achieved net sales of $462.5 million for 2021, growing $399 million or 627%, demonstrating very strong performance. This is driven by increased volume in NURTEC ODT, which benefited from a partial year of sales associated with the expanded label to include prevention compared to a partial year of sales in 2020 with only at the acute label. Net revenues were also benefited by improvements in net price realization. R&D investment for the year end of 2021 on a non-GAAP basis was $287.1 million, compared to $195.4 million in the prior year period, an increase of $91.7 million or 47%. Again, the increase was primarily due to our continued investment in our post-approval international product expansion opportunities from rimegepant as well as other late-stage product candidates and preclinical research. The late-stage products I mentioned earlier also comprised the vast majority of our spend for the year. SG&A expense for 2021 on a non-GAAP basis was $623.6 million, compared to $428.6 million in the prior year, an increase of $195 million or 45%. The increase was primarily due to increased promotional activities supporting NURTEC ODT commercial sales in 2021 for the treatment and prevention migraine, which got its dual indication approval on May 21. And compare that to the same period in 2020, which reflects pre-commercial and promotional NURTEC ODT spend, which was launched in March of 2020. Now turning to our balance sheet. Pro forma for the closing of our collaboration and subscription agreements with Pfizer in early January, we have access to approximately $1 billion of liquidity. As of December 2021, we have $367 million in cash and cash equivalents and marketable securities, immediate access to $125 million from our debt facility with Sixth Street and an additional $500 million of cash we received on January 4 from Pfizer. Let me echo what Vlad said about our excitement over our recently announced acquisition of Channel Biosciences, adding a valuable Kv7 program for epilepsy and potentially other indications to our pipeline. The terms of the deal are as follows: a consideration comprised of $65 million Biohaven stock and $35 million in cash. Successful â success-based milestone payments broken down as follows: BHV-7000 regulatory milestones of up to $325 million for U.S., EMA and Japan approvals for epilepsy and $250 million for additional geographies and additional indications for Kv7. BHV-7000 sales-based commercial milestones are up to $562.5 million with the full amount achievable on reaching $3 billion in annual sales. And weâll pay scale royalties for BHV-7000 of high-single digits to low teens. And for additional programs, weâll pay starting royalties in the mid-single digits. And with that, let me turn it over to BJ Jones, our Chief Commercial Officer. BJ?