The presence of mycobacterial DNA was investigated by amplifying the gene encoding the 65 kDa antigen, although this target is of doubtful use as it is found in all environmental mycobacteria.
One clear danger is that they may alienate customers, who will welcome better service but may be more doubtful about uses of the technology such as finely segmenting the market or targeting customers individually.
It is, however, doubtful whether the use of such terms as nationalism, particularism, or exclusivism are of any great help in understanding the situation.
Some men doing the dustiest work were given coveralls and paper surgical masks for safety, but a later report by the Defense Nuclear Agency said, "It is doubtful that the use of the surgical mask served more than a psychological barrier".
The midwives were doubtful about the use of information sources on the Internet because they could not control or evaluate the information.
If the application of the t test is doubtful, the unconditional use of nonparametric tests seems to be the best choice [ 56].
We conclude that if such a case exists, then it is doubtful that the use of rituximab in CLL population in Ukraine will be cost-effective.
It seems doubtful, though, that the use of plant ash would result in boron concentrations of nearly 1%, especially considering the toxicity of boron for plants and the ability of boron-tolerant plants to effectively efflux boron [55], [56].
Corticosteroids were withheld for four weeks prior to phlebotomy and bronchoscopy, so it is doubtful that the prior use of inhaled corticosteroids is responsible.
