"These publications challenge de facto censorship.
Two recent publications challenge this long-lasting supremacy: namely, the Anastrozole, Tamoxifen Alone or in Combination (ATAC) trial for adjuvant therapy [ 3], and the IBIS International Breast Intervention Studyy) trial for primary prevention [ 4].
The study, which is being submitted to a journal for publication this summer, challenges several popular notions about mane development -- for example, that the healthier a lion, the lusher its mane.
Once a paper, of whatever type, has been approved for publication, several challenges remain for the editor.
She contributed to Cairo Magazine a now-defunct publication that challenged the Mubarak regime as well as the Times Magazine and The Atlantic.
Related publications identify challenges for implementing pharmacovigilance in resource-constrained settings [ 15] and propose strategies to complement spontaneous reporting for monitoring the safety of medicines in public health programmes [ 7].
Studies that attempt to integrate data from multiple databases and publications present challenges to the mapping of terms and data associated with these terms across different resources because database providers or authors may choose to use different terms with the same meaning or more granular terms to describe specific datasets.
Though it's clear that mainstream publications are challenged by the Internet, small magazines keep turning up.
But the notion that independent publications could challenge established media concern because it costs very little to publish online has fallen on hard times along with the rest of the Web's early illusions.
As a paper and as a Web site, it has thrived, even if the business, like most publications, is challenged by the crisis in advertising and the tidal shifts in technology.
In recent times, a number of key publications have challenged former concepts resulting in a change in opinions and understandings.
