[1
]Karmanos Cancer Institute/Family Medicine, Wayne State University, Detroit, Michigan
40202, and Research Center for Group Dynamics, University of Michigan, Ann Arbor,
Michigan 48109; email:
[2
]Psychology Department, University of Connecticut, Storrs, Connecticut 06269; email:
[3
]Department of Sociology, University of Wisconsin, Madison, Wisconsin 53706; email:
[4
]University of Arkansas, Fayetteville, Arkansas 72701; email: