Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

View full-text article in PMC

. 2020 Mar 23;8(4):E525–E533. doi: 10.1055/a-1093-0877

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives License, which permits unrestricted reproduction and distribution, for non-commercial purposes only; and use and reproduction, but not distribution, of adapted material for non-commercial purposes only, provided the original work is properly cited.

PMC Copyright notice

Fig. 1 — European nations included in the survey: Italy, Portugal, Denmark, France, the Netherlands, United Kingdom, Germany, Belgium, Croatia, Romania, Lithuania, Sweden, Greece, Poland, Russia and Serbia.