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. 2020 Apr 21;162(6):1229–1240. doi: 10.1007/s00701-020-04342-5

Table 1.

Count of all respondents, grouped by country, and arranged in descending order. Countries denoted by an asterisk are designated as “low-to-middle-income countries” by the World Bank [11]

Country Number of respondents (percent of total)
Countries with > 1% of respondents
  United States 200 (44.4)
  Italy 55 (12.2)
  India* 21 (4.7)
  Brazil 16 (3.6)
  United Kingdom 14 (3.1)
  Mexico 11 (2.4)
  Germany 8 (1.8)
  Panama 8 (1.8)
  Canada 7 (1.6)
  Hong Kong 7 (1.6)
  Argentina 6 (1.3)
  Colombia 6 (1.3)
  Poland 6 (1.3)
  Cuba 5 (1.1)
Countries with < 1% of respondents
  Ecuador, Greece, Netherlands, Japan 4 (0.9)
  Austria, Chile, France, Indonesia*, Russia, Turkey, Vietnam* 3 (0.7)
  China, Malaysia, Romania, South Korea, Switzerland, Venezuela* 2 (0.4)
  Afghanistan*, Australia, Azerbaijan, Bangladesh*, Belgium, Costa Rica, El Salvador*, Grenada, Guatemala, Hungary, Iraq, Israel, Libya, Nicaragua*, Papua New Guinea*, Puerto Rico, Rwanda*, Saudi Arabia, Serbia, Somalia*, South Africa, Spain, Sri Lanka, Spain, Sweden, Syria*, Thailand, Tunisia*, Yemen* 1 (0.2)