Some of the complications arise as a result of institutional barriers between the child support system and the military system. (childandfamilyresearch.utexas.edu)
If that doesn't work, you'll have great material on institutional barriers for your blog! (dotearth.blogs.nytimes.com)
Such novel approaches are not without challenges, speakers said, including institutional barriers and academic resistance to altering the way courses are taught, particularly core courses. (aaas.org)