Thank you, Michael, and good morning. Welcome to our fourth quarter 2020 earnings call. To begin today's call, I'd like to take a minute to talk about our shift in strategy in 2020. We started the year with a strategic plan that began with the completion of the transition of Five Star senior livings leases to management agreements. With that we had our primary operator undergoing a turnaround but on sure financial footing. We plan to spend considerable capital in our shop segment and we had a plan to sell properties with the intent to reduce leverage in order to maintain an investment grade rating. Because of COVID-19, these plans changed. We swiftly mobilized to combat the effects of the pandemic, operationally and financially, our focus shifted to working closely with the tenants in our office portfolio segments to ensure their continued success through the pandemic and to support Five Star's extensive measures to safeguard the health and well being of residents and employees and our senior living communities. The fact that they were financially secure allowed them to be laser focused on their COVID response. Where necessary, we altered the timing of our capital spend in our portfolios and also worked to strengthen the financial stability of DHC by reducing our dividend eliminating near-term debt maturities and by working with our lenders to ensure our liquidity position. Finally, in the second quarter as part of our multi-year review of our governance policies, we were pleased to expand the company's board with a new independent trustee with deep commercial real estate and capital markets expertise. While, we can say that we did not expect this unprecedented global pandemic nor the wake of its economic and social disruption. We're pleased that our asset diversification provided some stability through the year evidenced by our office portfolios continued performance through the pandemic. We remain confident that with the steps that we've taken this year, combined with the expected post-COVID senior living demographic tailwinds, DHC is on the path of growth and improved profitability. Five Star began hosting COVID vaccination clinics for residents and employees in our SHOP communities in December 2020. As of February 20, approximately 16,000 or 87% of residents and over 7000 or 43% of employees have received at least the first dose of the vaccine. Additionally, close to 10,000 residents have received the second dose of the vaccine. Five Star has rolled out a series of educational sessions to encourage the acceptance of the vaccine and expects to be substantially complete with vaccination clinics by the end of the first quarter of 2021. After the fourth quarter of 2020 holiday season, much like the rest of the country, we saw an increase in positive COVID cases in our senior living communities, which remained elevated through January of this year. As a result, same property SHOP average occupancy declined to 72.7% in the fourth quarter. Sequentially same property SHOP average occupancy was down 320 basis points or approximately in line with the expectations announced in our third quarter call of 24 basis points of lost occupancy per week. Since this surge in COVID cases, we're encouraged to see a decrease in active cases as of February 20; just 2.5% of residents in our communities had active cases of COVID-19, down from 3.5% as of January 29. Finally, as of February 20, approximately 99% of our communities are accepting new residents in at least one line of business. And while move-ins remained modest in the fourth quarter of 2020, as a result of both the pandemic and seasonality, recent leads have accelerated. As of February 20, trailing four week leads represented an 87% increase over the beginning of the fourth quarter and we're approximately 32% higher than the rolling four week average as of March 1, 2020, which was just as the pandemic became prevalent in the United States. We're optimistic that the vaccines will not only improve the safety and well being of current residents, but will also improve the resident experience in our communities, which we believe will be a driver in the recovery at our communities in the industry. The CDC recently quoted a 2020 study, concluding that social isolation significantly increased a person's risk of premature death from all causes, risks that may rival those of smoking, obesity and physical inactivity, especially with older adults. In this study, loneliness and social isolation were associated with approximately a 50% increased risk of dementia, a 29% increased risk of heart disease and a 32% increased risk of stroke. As a result, we believe there is a critical need for the socialization and quality care provided in senior living communities. Finally, we're starting to see a positive supply trend. While senior living inventory growth in 2020 remains elevated as a result of investments made 18 to 24 months ago by those seeking to capitalize on the aging population in the United States. In early 2020, construction starts began to slow materially and inventory growth is expected to moderate in 2021 as a result. We expect the combination of these factors to result in a favorable supply demand dynamic and support the senior living industry as vaccine distribution continues and the pandemic wanes and pent up demand translates to increased move-ins. As of the fourth quarter, same property occupancy and DHC's office portfolio was 93.7%. a 70 basis point increase over the third quarter and a 10 basis point increase year-over-year, largely driven by a 100,000 square foot full building lease signed by a life sciences tenant in Fremont, California. During the fourth quarter, we executed 413,000 square feet of new and renewal leases, more than doubling our previous quarters results. These leases were signed at a weighted average lease term of 5.4 years, with leasing costs of approximately $4.43 per square foot per year. While we saw our roll down in rent for leases executed this quarter of 7.9%, it was related to one short-term renewal by a tenant who required flexibility due to the pandemic, excluding that renewal, rents on our executed lease deals for the quarter rolled up 7.4%. We have signed letters of intent for an additional 136,000 square feet at our Torrey Pines redevelopment in San Diego. If these leases are executed, we'll have least 85% of the redevelopment project at an average of close to 22% roll up in rents. During our third quarter call, we reported that as of November 2, DHC had granted rent deferrals equal to $1.8 million in the office portfolio segment, down from the $2.4 million reported during our second quarter call. To-date, the total amount of deferred rent remains unchanged and represents 0.4% of DHC's total annualized rental income. We've had no new rent deferral request since our last call. Our triple net senior living portfolio represented 10% of fourth quarter NOI. As previously mentioned on our prior calls, we had granted a partial rent deferral to one tenant in this portfolio, which has begun to repay their deferred rent as planned. The remaining triple net senior living tenants are current with no additional requests for deferrals. These properties had rent coverage of 1.61x in aggregate as of the third quarter of 2020 compared to 1.69x at the end of 2019. Our Wellness Center portfolio represented 3.5% of fourth quarter NOI and was relatively flat sequentially. As we've mentioned in the past, this portfolio is made up of two tenants, one of which was previously in default, subsequent to quarter end, we restructured and extended this tenants lease and both tenants are now current. Finally, before I turn the call over to Rick, I'd like to recognize the hard work and dedication exhibited by our operators and managers, employees during the year. Recently, the RMR Group was named as one of the 2020 top places to work in Massachusetts by the Boston Globe. We're proud to be part of an organization that demonstrates continuous commitment to its employees by providing the resources, development and innovative workplace necessary to succeed. These employees are critical to the success of our properties. And I believe that having these highly motivated and engaged professionals will contribute to DHC's path toward growth and improved profitability. I'll now turn the call over to Rick to provide details on our financial results.