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L_R standing: Niels Bohr, N. Visconti, G. Ehrensvard, Wolf Weidel, C. Heden, V. Bonifas, Gunther Stent, Hermann Kalckar, Barbara Wright, James Watson and Mogens Westergard; seated: Ole Maloe, R. Laterjet and Elie Wollman. Biology. March 1951