Nomination of Dr. Robert Califf to be Commissioner of Food and Drugs, Food and Drug Administration, Department of Health and Human Services : hearing of the Committee on Health, Education, Labor, and Pensions, United States Senate, One Hundred Seventeenth Congress, first session on examining the nomination of Robert McKinnon Califf, of North Carolina, to be Commissioner of Food and Drugs, Department of Health and Human Services, December 14, 2021.