However, most of these taxa have had their validity questioned [22], [32], so that the number of legitimate species that can be assigned to the Bagaceratopsidae is presently uncertain.
Some have questioned its validity, others have claimed that it has been abused.
While some authors have suggested the use of late radiographs as the final arbiter in the detection of occult fractures (Farley et al. 2001, Sankar et al. 2008, Simanovsky et al. 2009), others have questioned its validity (Tiel-van Buul et al. 1997).
Despite this wide adaptation of the BED in lung SBRT, many have questioned its validity because of the potential overestimation of tumor cell kill when large doses of radiation are delivered in 1 fraction by the linear quadratic (LQ) formalism [ 6– 8].
Although this reasoning has long been cited by regulators and commentators as a basis for mandating disclosure, recent work has questioned its validity.
It's a tiny, intimate drama that has none of Hendrix's music and is a little iffy on the facts (Hendrix's former girlfriend, Kathy Etchingham, has questioned its validity) but is powered by a giant squeal of the mercurial guitar hero's spirit.
It was ensured that all questions had face validity; questions were clear, non-ambiguous and fair.
Although the Depression scale of SCL-90 has been widely used, its validity has been questioned (Cyr et al., 1985; Schmitz et al., 2000; Zack et al., 1998).
Self-report is commonly used, and although readily available and inexpensive, its validity has often been questioned [ 21].
However, automated classification has been found to identify more readmissions as potentially preventable than does manual review, so its validity has been questioned [ 5, 7].
