For March 10, 1999

Dr. McDonald Horne did his undergraduate work at Princeton University. He earned his medical degree at Duke, where he stayed on to do an internship and residency in medicine, and a hematology fellowship. He spent two years as a hematologist/oncologist at the David Grant USAF Medical Center in California, followed by another hematology fellowship at Upstate University Medical Center in Syracuse. He then spent three years in private practice in Dallas.

Dr. Horne arrived at NIH in 1980 as a clinical associate in the Hematology Section of the Clinical Center's Clinical Pathology Department, where he has remained ever since. He is currently a senior clinical investigator.

Dr. Horne's research interests include hypercoagulability and thrombotic complications of venous access devices.

Dr. Clarence Gibbs is chief of the Laboratory of Central Nervous System Studies in NINDS. A lifelong resident of Washington, D.C., Dr. Gibbs earned his bachelor's and master's degrees, and a doctorate in microbiology at the Catholic University of America.

Dr. Gibbs spent eight years as a medical bacteriologist with Walter Reed Institute of Research, before coming to NIH in 1959. He started with NIAID, studying arthropod-borne viruses. In 1962, he moved to NINDS to head the Branch Virus Laboratory. In 1971 he joined the Laboratory of Central Nervous System Studies as its deputy chief, became acting chief in 1996, and was appointed chief in January 1998.

Dr. Gibbs has a long-standing interest in bovine spongiform encephalopathy, also known as "mad cow disease."

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