The authors propose that the source of this small bias may be related to technical factors, e.g., positron range or other resolution effects, but may also be attributed to physiological factors, e.g., red blood cell uptake which has been demonstrated with other potassium analogs such as 201Tl [11].
A meta-analysis of more than 120 studies demonstrated that regular users were less impaired than occasional users at the same THC concentration (Wolff and Johnston [2014]), which may be attributed to physiological tolerance or learned compensatory driving behavior (DuPont et al. [2012]; Grotenhermen et al. [2007]; Wolff and Johnston [2014]).
Differences between duplicate assays were considered to reflect laboratory/measurement error, while variation between visits within a patient was attributed to physiological fluctuation.
There is widespread consensus among health care professionals that obesity can be attributed to physiological, psychological, and social factors [ 5].
To investigate whether enhanced Stx2 translocation under microaerobiosis could be attributed to physiological changes in the host cells, subsequent incubations were performed with either EDL933 or purified Stx2.
This discrepancy could be attributed to physiological differences between prepubertal and adult females and/or to differences in the ovarian stimulation treatments.
This gender differentiation in physical activity levels should not be attributed to physiological differences between the two sexes but to social and cultural beliefs of parents and teachers as to the types of activities appropriate for boys and girls.
For example, analysis of clonal variants, in vitro, indicates that sensitivity to HDACIs is shared by all clonal variants within cell lines indicating that sensitivity is not dictated by heritable genetic/epigenetic differences between variants but can be attributed to physiological differences within the cell populations at any given time such as, cell cycle state or metabolic state.
These transient, dose-dependent reductions in heart rate on day 1 were clearly due to BAF312 whereas other sporadic, non-dose-dependent decreases and increases in heart rate were also noted on days 2, 3 and 27 (data not shown), which could rather be attributed to physiological variability.
A large group of such pollutants, labeled endocrine disrupting chemicals (EDCs) [ 78], has been attributed to significant physiological and even behavioural changes such as increased hunger, which can lead to obesity [ 79].
