General and administrative expenses were $9.6 million for the third quarter of 2021 as compared to $8.2 million for the comparable period in 2020. This increase was primarily due to an increase in employee headcount, which includes the impact of non-cash stock-based compensation, which was offset by a decrease in facilities costs, professional fees and legal fees. As of September 30, 2021, AVROBIO had $201.4 million in cash and cash equivalents, as compared to $259.7 million in cash and cash equivalents as of Dec. 31, 2020.