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. 2022 Jul 11;29:101903. doi: 10.1016/j.pmedr.2022.101903
Response U.S. participant count Sample selection
Yes. Both public and private 5384 Selected
Yes. Public only 830 Selected
Yes. Private only 3184 Selected
None/ Rather not say 7206

Note: Counts collected on 8 March 2021.