Sentence examples for has not been occurring from inspiring English sources

They also suggest that vessel regression has not been occurring in these tumors and that the blood from ruptured vessels has not filled tumor-lined lakes or channels.

But the ovarian stimulation has not been proved to occur in patients.

This phenomenon has not been shown to occur in cold (i.e., < 4 °C) freshwater environments.

However, pernicious anemia has not been reported to occur at a high incidence in patients with breast cancer [3].

But the issue has not been whether violence occurred at the demonstration.

Many studies indicate that consistencies in time can benefit visual and attentional performance [25], but this has not been shown to occur on the timescale of transient attention.

Unfortunately, this has not been demonstrated to occur.

This transcriptional repression has not been found to occur extensively in breast cancer [ 18].

However, so far, alternative splicing has not been reported to occur in F. graminearum.

Burkholderia pseudomallei is a bacterium endemic to Southeast Asia and northern Australia, but it has not been found to occur endemically in the United States.

In contradistinction to experimental IBD, NEC has not been found to occur spontaneously in any model, and must be induced experimentally.