Cartilaginous fishes continuously replace their teeth throughout their life (polyphyodonty) and often show a sexually dimorphic dentition that was previously thought to be an invariant sex character. Radial vector analysis of tooth shape in the polyphyodontic stingray Dasyatis sabina across a consecutive 24 month period shows a stable molariform morphology for females but a periodic shift in ma...

On the basis of extensive research on the relationship between physical activity, exercise and health, as well as strong support from policymakers and practitioners, the "Exercise is Medicine" initiative has become something of a linchpin in the agenda for modern healthcare reform and reflects a broader acceptance that the philosophy of health politics must shift from social engineering to perf...

This executive summary of Senator Durenberger's remarks was prepared by Julie Snyder of the University of Texas LBJ School of Public Affairs. The remarks were given in the context of a panel presentation moderated by Senator Durenberger, entitled "Provider and Insurer Perspective."

A s outgoing Chief Editor of the European Respiratory Review (ERR), I am delighted to be able to share with you some facts and thoughts in this farewell editorial. Over the last 4 yrs, the new ERR has grown and matured thanks to the leadership of an international editorial board and the outstanding support of the Publications Office. In this new era for the ERR, our aim was to further enhance s...