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  1. The Restrictions Of On-line Surveys - PMC

    Online surveys have gotten more and more standard. There were 1682 PubMed hits for "[url=https://tanhuaba.xyz/home.php?mod=space&uid=4135817&do=profile&from=space]online survey[/url]" (search phrase entered with quotes) in 2016; this number elevated to 1994 in 2016, 2425 in 2017, 2872 in 2018, and 3182 in 2019. On August 15, 2020, the number of hits for 2020 was already 2742; when annualized, this quantity initiatives to 4387. In distinction, the expansion for the search term ...