Unfortunately one error in the text could not be corrected. The following sentence should be changed from
"Seventy-seven completed country questionnaires were returned, 21 from G-countries and 56 from NG-countries, a response rate of 80%. Of the 77 responding countries, 45....."
to
"Seventy-eight completed country questionnaires were returned, 21 from G-countries and 57 from NG-countries, a response rate of 80%. Of the 78 responding countries, 45....."
Erratum...
17 February 2011
Unfortunately one error in the text could not be corrected. The following sentence should be changed from
"Seventy-seven completed country questionnaires were returned, 21 from G-countries and 56 from NG-countries, a response rate of 80%. Of the 77 responding countries, 45....."
to
"Seventy-eight completed country questionnaires were returned, 21 from G-countries and 57 from NG-countries, a response rate of 80%. Of the 78 responding countries, 45....."
Competing interests
None declared