None of the women presented with any side effect and our previous studies have shown this medication does not have an effect on the samples collected [23].
Although this may have an effect on the estimates, the sampling weights have been adjusted to account for attrition (32).
Freezing and increased storage time result in a decreased number of samples containing E. coli and increase the number of samples with CNS without an effect on the number of samples testing positive for streptococci or S. aureus [ 30, 31].
This also had an effect on the number of samples exposed to different drugs, with many samples (N = 18,392 of the total 19,611) exposed to the first antiretroviral drug, AZT, but fewer for recently approved drugs such as ETR (N = 1,545).
As expected, the mean rate and confidence values ((E(T) and SD T), respectively) have an effect on the parameter space sampled, which is clearly visible when comparing the range of values between the different x-axes (Figs. 2 and 3).
Since preliminary analyses had revealed that the total amount of chemicals in the sample has an effect on the detection and quantification of certain components, samples in which the pheromone concentration was either too high or too low were rerun after adjusting the pheromone concentration by addition or evaporation of hexane.
Among lots of parameters like distance between electrodes, initial pressure of carrier gas, temperature and time of deposition, RF power, etc., that have an effect on the final properties of samples, the variations of initial pressure were also investigated.
In each replicate, the actual QTL with an effect on the trait were randomly sampled from those candidate QTL.
There was also evidence that season of blood sample collection had an effect on the concentration of Vitamin D, with blood samples which were taken in spring and winter having lower Vitamin D than those taken in summer and autumn (P = 0.011).
