All GSHS surveys were approved in each country by both a national government administrative body and an instit…
As the current study used retrospective publicly available data, we did not require ethics approval.
Ethics statement In each of the participating countries, the GSHS received ethics approval from the Ministry o…
Ethical approval was granted from the Ethics Committee of Stockholm.
Ethical approval was granted from the Ethics Committee of Stockholm. No informed consent was required for thes…
approval from an Institutional Review Board was not necessary
Because the data used in this investigation are publicly available and deidentified, approval from an Institut…
No protocol approval was needed for this study
No protocol approval was needed for this study in accordance with the Declaration of Helsinki. The data used w…
The study was not considered human research
The study was not considered human research according to the review policy of the Research Institute at Nation…