1.   And a companion study finds more traffic when roads open.

2.   A companion study would have looked for pockets of low-cancer incidence not corresponding to smoking based on a survey of desert populations, another memo shows.

3.   A companion study, which compared New York doctors with those in Texas, found similar divergence in heart attack care.

4.   But the authors say a companion study of Hispanic students is under way.

5.   In a companion study in Science, researchers at the University of California in San Francisco led by Gabriele G. Grunig and Dr. David B. Corry report similar findings.

6.   A companion study said container stevedoring performance is hampered by complex, inflexible and prescriptive work practices.

7.   It was released along with a companion study of household wealth.

8.   The federation and the financial services firm, Primerica, released the poll and a companion study of household wealth today.