Before revision:  About 60\% of multiple affiliations involve institutions from within the academic sector and international co-affiliations  often involve institutions from the United States,  Germany and the United Kingdom as well as institutions in neighboring countries .
After revision:  About 60\% of multiple affiliations involve institutions from within the academic sector and international co-affiliations , which account for about a quarter of multiple affiliations, most often involve institutions from the United States, Germany and the United Kingdom as well as institutions in neighboring countries .