It must be noted that several difficulties arose during the data collection process.
We focused our analysis on factors contributing to sleep fragility during non-rapid-eye-movement (NREM) sleep (stages N2 and N3, accounting for the majority of sleep [7]), as several difficulties arise when considering alpha activity during rapid-eye-movement (REM) sleep (see Discussion).
In comparing TTI and TS, several difficulties arise.
Likewise, several difficulties arose due to the complexity of dealing with large multigene families.
Nevertheless, it is worth pointing out that in our work, since we get sphere-concentrating solutions, several technical difficulties arise.
In several publications, difficulties arose in estimating a suitable distribution for MN, even in the untreated historical control groups.
The following analysis of the recent cases of Océano,i Bellone and Centrosteel will try to shed some light on several difficulties that arise when judges nonetheless try to give some effect to a directive, which has not been transposed in a timely manner, governing the relation between individuals.
Several difficulties may arise when it comes to the implementation of the study plan.
Several difficulties can arise in the detection of bacterial RNA by hybridization.
Several difficulties have arisen, however, with respect to rights of ownership or tenure, with governmental regulation of forest management and production, investment, harvesting and marketing of outputs.
the difficulties arising from Congs.
