'longstanding collaboration' is a correct and usable phrase in written English.
It means a partnership or relationship between two entities that has existed for a long time. For example: The two research groups have enjoyed a longstanding collaboration since the first project began in 2006.
A longstanding collaboration During the India-Pakistan series in 2004, the captains of both teams collaborated to run alongside children who were holding banners bearing the polio campaign slogan.
American officials value their longstanding collaboration in particular with Mr. Wardak, who is seen as a stable ally compared with the mercurial Mr. Karzai.
Alfredo has a longstanding collaboration with LLNL, where he spent two and a half years as a postdoctoral research staff member prior to coming to ICSI.
On a visit to Rome this month, Assistant Attorney General Lanny Breuer expressed concern about the bill's impact on the longstanding collaboration between the American and Italian authorities in organized crime and counterterrorism investigations.
There are also two other Yamamoto projects in London, as well as a new flagship Y-3 store on Conduit Street celebrating the designer's longstanding collaboration with the sports giant Adidas.
The study, part of a longstanding collaboration between researchers at Brown University and Massachusetts General Hospital, examined four patients who were already undergoing a procedure to study the origins of their seizures.
When you see these longstanding collaborations, it goes a very long way.
The agreement builds on longstanding collaborations led by faculty in astrophysical sciences, East Asian studies and the Woodrow Wilson School of Public and International Affairs.
This is due to the security concerns in the Western hemisphere and many longstanding collaborations between the U.S. and Mexico.
While international aid will help combat the disease, Mr. Arthur underscored the need for a regional approach to build on longstanding collaborations in health, research and economic matters.
Her work includes longstanding collaborations with bioengineers at both the University of Pennsylvania and Dartmouth to study the biomechanics and consequences of various mechanisms of head injury in patients of different ages, from infants to adolescents.
