Sentence examples for specimens are difficult from inspiring English sources

Liver cancer tumor specimens are difficult to obtain, and noninvasive methods are required to assess cancer progression and characterize underlying genomic features.

Dried blood spots (DBS) specimens can be used for hepatitis C virus (HCV) infection screening in cases where serum specimens are difficult to obtain.

Ground truth comparisons between PET/CT target volumes and pathological specimens are difficult without precise registration of the immunohistochemical fluorescence or autoradiographical image of the surgically resected sample and the segmented PET/CT image.

In the Darwinius specimens (plate A and B) the proportions are similar but the flattened specimens are difficult to measure with accuracy.

It is simple and will be of great utility in situations where sputum specimens are difficult to obtain or sputum-smear is negative.

Such specimens are difficult to acquire in clinical practice where formalin fixation is the standard procedure for processing tissue.

Direct comparison of specimens is difficult, however, since the spacing of CFRP strips was different.

Finding specimens was difficult because access to platypus habitats required back-country travel, and moreover, once in platypus country, the stealthy, shy platypus was difficult to sight and even more difficult to capture, alive or dead.

First, the procurement of human hip specimens is difficult due to current legislation.

To conclusively assign etiological relevance to any biological process altered in such specimens is difficult, considering the causality dilemma.

Demonstrating IL-1β cleavage by caspase-1 in biologic specimens is difficult, while demonstrating increased activity of the inflammasome is even more challenging [ 43].