Zheng Xiaoyu was the commissioner of the Food and Drug Administration from its founding in 1998 until mid-2005, when he was removed from his post.

"There are big-time non-linearities here," confirms Donald Kennedy, a former commissioner of the Food and Drug Administration and a contributor to the book.

I didn't understand my own behavior and I was commissioner of the Food and Drug Administration.

Dr. Michael A. Friedman, the acting commissioner of the Food and Drug Administration, agreed that the hazards are growing.

Hundreds of Web sites sell drugs illegally, said William Hubbard, the associate commissioner of the Food and Drug Administration.

The most persuasive among them is David A. Kessler, former commissioner of the Food and Drug Administration.

Mark B. McClellan, the new commissioner of the Food and Drug Administration, knows he has critics lying in wait.

The letter said Lester Crawford, the acting commissioner of the Food and Drug Administration, joined in the request not to publish.

I know that he will apply his skills as tirelessly in his new position as he did as commissioner of the Food and Drug Administration.

In 2001, he was considered a candidate to become the commissioner of the Food and Drug Administration.