text: * Member of the American Academy of Arts and Sciences (1956).
  * Member of the United States National Academy of Sciences (1978).
  * Honorary professorship by the Faculty of Medicine of the University of Barcelona (Spain).
  * Honorary degree by the University of Montpelier (France).
  * Honorary degree by the University of Chile, Santiago (Chile).
  * Medal as honorary councilor of CSIC (Supreme National Council for Scientific Research, Spain).