Bruins defenseman Michael Callahan will play on Tuesday against Minnesota, but he spent most of the weekend in a dentist's ...

Michael Callahan directing an air evacuation of a U.S. serviceperson with infectious disease from Africa Michael V. Callahan, M.D., DTM&H (U.K.), M.S.P.H., doesn't wear a military uniform, but he ...

If there is trouble somewhere in the world, Michael V. Callahan, M.D., DTM&H, M.S.P.H., probably isn’t far away. For three months every year, Callahan, a 1991 graduate of the UAB School of Public ...