11.   The New York region includes New York City, Long Island, the Hudson Valley and northern New Jersey.

12.   The New York region included New York City and some northern suburbs, but Nassau and Suffolk counties and Newark, N.J., were counted separately.

13.   The Los Angeles region includes Ventura, San Bernardino, Orange, Riverside and Los Angeles counties.

14.   The organs of a Dallas donor would usually not go to Fort Worth because the Dallas region includes other areas of the state, such as Tyler and Galveston.

15.   The region includes the three provinces of Zhejiang, Anhui and Jiangsi.

16.   The West-South-Central region includes Louisiana, Arkansas, Oklahoma and Texas.

17.   Though some of those runs have dropped to extremely low populations, scientists say the three regions include the healthiest remaining U.S. runs.

18.   Other regions of operation include the western states of Jalisco and Michoacan and the southern state of Chiapas, on the border with Guatemala.

19.   Chechens have traditionally practiced a moderate form of Islam, but the region also includes fundamentalist Wahhabis.

20.   Chechens have traditionally practiced a moderate form of Islam, but the region also includes fundamentalist Wahhabis, a movement that has its origins in Saudi Arabia.