1. Based on a survey of n=2,752 Invisalign doctors who were asked, how much do you agree or disagree with the following statement: “Invisalign is the world’s most advanced digital orthodontic treatment system.” Doctors were surveyed in the USA, Canada, UK, Brazil, Germany, France, Spain, Italy, China, Japan, and ANZ. Data on file at Align Technology, as of July 10, 2020.