And nobody knows exactly what the trigger might be or how it is translated biochemically into a clot.

ECONOMIST: Deep-vein thrombosis: Causing trouble | The

She and tobacco experts Ballin and Mackay say they know of no other company with such a biochemically-based filter.

FORBES: Breakthroughs

It's biochemically impossible to dislike San Francisco, one of the planet's finest towns.

WSJ: Jason Gay: San Francisco Is Very Hard to Hate