considering this program , the centre d'etudes et de recherches de medecine aerospatiale , under the sponsorship of the centre national d'etudes spatiales , developed both a program of research on restrained primates for the french-u.s. space cooperation ( spacelab program ) and for the french-soviet space cooperation ( bio-cosmos program ) , and simulation of the effects of microgravity by head-down bedrest .
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