An FDA scientist, who doubles as a driver, loads cable covers into the chemistry mobile laboratory.

An FDA scientist scans a bar code into a tracking database in the mobile laboratory's command center.

An FDA scientist places a lettuce sample into the grinder (background).

FDA scientists add enrichment broth to a sample rinse solution.

An FDA scientist places a sample contained in an enrichment broth into an incubator to grow overnight.

But FDA scientists working in the mobile lab have streamlined the operation by reducing the time involved with sample reporting.

FDA scientists, and ultimately, the expert panel reviewing scientific data, disagreed.

FDA scientists will use the information to determine if the product has a history of problems and represents a public health concern that needs to be addressed.

FDA scientists bring regulatory relevance to the collaboration.

But FDA scientists said Thursday that no scientific studies have shown the drugs improve cancer patients' quality of life.