Analyses of these trends suggested that apparent decline rates may represent long-term discharge variation as a result of anthropogenic induced change in seasonal flow and/or may also represent true long-term declines in annual flow.
Even if the Spanish clade may result from a gradual expansion of the species from eastern France to Spain, both Spanish and Italian populations may represent long-term isolates, explaining their relatively high level of endemism [3], [8].
The observed association between maternal stress during pregnancy and child health may represent long-term consequences of subtle adaptations in multiple organ systems to the intrauterine environment (Bateson et al. 2004).
Prolonged detection episodes may represent long-term viral shedding after new acquisition of virus, especially in young patients, or reactivation or stimulation of replication of persistent virus in the respiratory tract because of immune suppression or a recent or concomitant respiratory virus infection.
Thus, assessment of genotoxics at only one point in time may not represent long term occurrence of these substances in the body [ 13].
A few prospective studies have been published, and most of the studies measured alcohol intake at baseline only, which may not represent long-term intakes of individual subjects.
An important limitation of the exposure measurements is that the within-person stability of BPA concentrations over 1 3 years was quite low (ICC = 0.14), suggesting that first morning urine samples may not represent long-term exposure levels.
Finally, it may not be obvious, but short-term consumer gains can still represent long-term harm to the competitive process and long-term harm to consumers.
The median and average concentrations could be seen to represent long-term chronic exposure and accumulation of ENPs in tissues which may over time affect organism health.
However, this study suffers from small sample size (78 cases), the potential for exposure misclassification [for example, a single measurement of erythrocyte Hg (Ery-Hg) taken at enrollment up to 10 years before the MI may not accurately represent long-term exposures of concern], and an exposure gradient that is potentially too narrow to detect an association.
Our analysis was based on a single, baseline assessment of physical activity, which may not have precisely represented long-term activity habits.
