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The James F. Mitchell Foundation, Institute for Medical Research, Washington Clinic, Washington 15, D.C., USA, and the Biological Institute, Carlsberg Foundation, Copenhagen, Denmark
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The James F. Mitchell Foundation, Institute for Medical Research, Washington Clinic, Washington 15, D.C., USA, and the Biological Institute, Carlsberg Foundation, Copenhagen, Denmark
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The James F. Mitchell Foundation, Institute for Medical Research, Washington Clinic, Washington 15, D.C., USA, and the Biological Institute, Carlsberg Foundation, Copenhagen, Denmark