1.   The fibrous tissues round the infected area impedes access of antituberculous substances.

2.   Access is further impeded by a lack of nearby roads.

3.   Claude A. Allen, the deputy secretary of health and human services, told Congress on Tuesday that the Clinton rules would impede access to care.

4.   He said the fences did not impede access to the water, but were intended to deter thieves, a constant problem for shrimp farms.

5.   The government has developed ways to impede easy access to American installations abroad and in Washington that can be borrowed for use elsewhere.

6.   The NPT regime will continue to impede access to fissile materials on the open market, but it will not do so in novel or more effective ways.

7.   Their purpose is to impede access to clinics by requiring patients and staff to run a threatening gantlet.

8.   Their stalls often obstruct the narrow sidewalks, forcing pedestrians into the busy streets and impeding access to established stores.

9.   Upwardly-mobile Mexican-Americans have been reluctant to call attention to a heritage that could impede access to the middle class.

10.   Sinanovic and Pesut traveled from the Croatian capital of Zagreb, where a three-year war impeded access of medical supplies to the clinic where Sinanovic was hospitalized.