The author wishes gratefully to acknowledge the assistance he has received from the following individuals and agencies over the period 1964-70 in the form of advice and information of a technical and statistical nature. Some of these sources are cited in the text; others have not been specifically named. All those who have helped the author cannot, of course, be held responsible for any errors of fact or interpretation in this book.

Professor J. Garrott Allen, Stanford University School of Medicine, California.

Dr J. B. Alsever, Blood Services, Scottsdale, Arizona.

American Blood Bank Service, Inc., Miami, Florida.

American Medical Association, Chicago.

Senator K. Anderson, Minister of State for Customs and Excise, Sydney, New South Wales.

Armour Pharmaceutical International, Chicago.

Aurora Area Blood Bank, Aurora, Illinois.

Banco de Sangre Metropolitano, Inc., Santurce, Puerto Rico.

Blood Bank of Hawaii, Honolulu, Hawaii.

Mr P. Carlinger, Pioneer Blood Service, Inc., New York.

Central Blood Bank of Pittsburgh, Pittsburgh.

Dr A. S. Chrisman, American National Red Cross, Washington.

Commonwealth of Massachusetts, Department of Public Health, Boston.

Community Blood Bank of the Kansas City Area, Inc., Missouri.

Community Blood Bank of Marion County, Inc., Indianapolis.

Greater New York Blood Program, New York.

Dr T. J. Greenwalt, Medical Director, American Red Cross, Washington.

Mrs D. Greystoke, Social Medicine Research Unit, London School of Hygiene and Tropical Medicine, London.

Dr B. G. Grobbelaar, Natal Blood Transfusion Service, Durban, South Africa.

Dr B. Gullbring, Karolinska Hospital, Stockholm, Sweden.

Mr J. B. Jennings, Operations Research Center, Massachusetts Institute of Technology, Cambridge, Massachusetts.

John Elliott Blood Bank, Inc., Miami, Florida.

Kabi Pharmaceuticals Ltd., London and Stockholm.

Professor T. Kamegai, Toho University School of Medicine, Tokyo, Japan.

Dr A. Kellner, New York Blood Center, New York.

Dr S. V. Kevy, Children's Hospital Medical Center, Boston.

Dr R. S. Koff, Massachusetts General Hospital, Boston.

Dr L. Lasagna, Johns Hopkins University, Baltimore.

Lilly Research Laboratories, Indianapolis.

Senator Edward V. Long, United States Senate, Washington.

Dr R. L. Mainwaring, Oakwood Hospital, Dearborn, Michigan.

Dr I. Malootian, Boston University Medical Center, Boston.

Dr C. C. Mason, Chicago Blood Donor Service, Inc., Chicago.