Sentence examples for serum samples were only from inspiring English sources

Serum samples were only available from 665 specimens.

Serum samples were only available from 27 of the 101 patients included, but all data collected before, during, and after antiviral therapy were available for these patients.

This study included the INMA cohorts of Asturias and Valencia, since serum samples were only available for PBDE determinations in these cohorts.

A persistent limitation for epidemiologic research, however, is that serum samples are only available from the present, which limits the ability to differentiate prevalent from incident disease.

Biotin-labeled ZE2 could bind to HCV particles in HCV patient samples with much higher affinities than to healthy donor samples (* p<0.05, Table 3, Fig. 4B), and the absorbance values of the HCV serum samples were not only proportional to serial dilutions of sera, but also to HCV RNA copies measured by RT-PCR (Fig. 4B).

Among the 10 patients with non-O157 E. coli from whom serum samples were available, only the patient who shed E. coli ONT:H7 developed anti-O157 LPS IgM, suggesting a recent infection with E. coli O157 which probably precipitated the HUS.

All serum samples were thawed only once.

Serum samples were collected only for the second experiment.

For determining serostatus (positive or negative), serum samples were tested only at 1 8.

All positive serum samples were retested; only those that had 3 ELISA-positive results at >1 400 dilutions were considered positive.

When dog serum samples were tested, only the sample from The Gambia showed a positive reaction in the ELISA, with an index of 1.0.