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La formation de métastases à distance de la tumeur primaire implique la circulation de cellules tumorales dans le sang. La détection de ces cellules peut avoir de multiples applications biologiques. L'amplification d'acides nucléiques par polymérisation en chaîne d'ADN (PCR), qui allie sensibilité et spécificité, est la technique de choix pour détecter quelques cellules tumorales dans un prélèvement...
An original protocol for the multicenter coordinated evaluation of seven analyzers for the measurement of ionized calcium is reported. The comparison of the instruments was made possible by using specific biological samples and newly developed HEPES or MOPS buffered aqueous reference solutions. The results for the evaluation of Ca/sup 2+/ instruments have shown that: (1) good precision and linearity...
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