Sentence examples for highly difficult to obtain from inspiring English sources

Since there is limited availability of early-stage human embryos used for hESC derivation, it is highly difficult to obtain HLA-matched hESCs for all patients.

If you refuse, second referrals can be highly difficult to obtain.

Some are extremely difficult to obtain.

Four-letter domains are extremely difficult to obtain".

Zohydro is highly controlled and difficult to obtain, and it comes with a warning label that reads like a guide to nuclear warfare.

These input data are often highly variable and difficult to obtain, so model estimates often do not agree with measurements made in the field.

To hold a ticket to watch the Yellow Jackets play was highly valued and was difficult to obtain.

In addition, serum VEGF levels in patients with different extents of disease are highly variable, making it difficult to obtain a single cut-off value as a predictor in all NHL patients [ 14].

First, most natural forms of biological agents are not highly infectious, and highly infectious seed stock is difficult to obtain.

However, the fabrication methods reported for highly ordered nanostructures are either difficult to obtain consistency or complicated and requiring expensive equipment.

The problems can be summarized into two broad categories: (1) it is difficult to obtain highly representative still images and videos that can allow the colposcopic examination to be quality-assured by other observers; and (2) conventional binocular colposcopes do not provide neither guidance for biopsy nor documentation of the biopsy procedure.