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.
Distribution of gastroenterology papers from 16 countries (Australia (AU), Canada (CA), Finland (FI), France (FR), Germany (DE), Israel (IL), Italy (IT), Japan (JP), the Netherlands (NL), New Zealand (NZ), South Africa (ZA), Spain (ES), Sweden (SE), Switzerland (CH), the UK, and the USA) and the world by research level (RL, 1=clinical to 4=basic): 1997-98.
