You reiterated your +20-30% LT revenue growth outlook (ex. COVID-19) at your November Investor Day. What drives conviction in this outlook? Key underlying drivers?  

You provided robust 2021 guidance, which calls for $3.7-$3.9B in revenue (+54% y/y, ~26% 2-yr CAGR). Can you help us understand how you’re thinking about the revenue cadence throughout 2021, particularly in the second half as you lap tougher comps? Are there sufficient buffers/elements of conservatism in your guidance? Invisalign (Volume vs. ASP; Americas vs. International) vs. iTero expectations? 

Whether it’s from ‘zoom smiles’ or stimulus check, do you think you saw a meaningful pull-forward dynamic during the pandemic?  

What drove conviction is putting out this annual guidance, particularly given you’ve historically guided on a quarterly basis?