Thus, it could be speculated, that differences found in the present study are due to differences in lipid composition of the surfactant preparations, however, subsequent studies are required to prove this hypothesis.
It may be speculated that differences in virulence factors or host adaptation between strains may influence the risk of spread.
It was speculated that differences in treatment practices and possibly cancer biology affecting tumor progression may exist among these ethnic groups.
Regardless, Börnigen et al. were unable to clearly distinguish a best or poorest method, and the reasons for differences were not identified; it was speculated that differences in the underlying data used were important.
It is unclear at this time why EMG is less in water, but it can be speculated that differences in muscle activity are related to reflex and/or fluid changes caused by water immersion [ 9].
Although there is no clear explanation for the divergences registered between studies, it could be speculated that differences in blood sampling schedule, sensitivity of hormone assays and formulation of hormonal products, may be responsible for the discrepancy.
Vacuolating cytotoxin purified from H. pylori causes mitochondrial damage leading to apoptotic cell death and it was speculated that differences in gastric mucosal cell apoptosis among H. pylori-infected persons may be caused by differences in the structure and activity of VacA allelic forms [ 19].
It has been speculated that the differences in the complement of Pcdhs in zebrafish and mammals could be related to the anatomical differences of their brains [ 20].
Secondly it remains unexplained why the degree of CpG under-representation is inversely proportional to the G+C content of the underlying sequence, although it has been speculated that there are differences in the accessibility of genomic DNA in high and low G+C regions to deamination [ 8, 9].
It has been speculated that the reasons for these differences were possibly genetic or cultural [ 2, 3].
