From the literature concerning studies on PAPR with OFDM modulation, one can find several possible topics of study in order to reduce PAPR in DDST with a modified data-dependent pilot sequence, and these are left for future studies.
The objective of this systematic review is to identify, evaluate, and synthesize the available evidence concerning studies on diagnostic reliability of osteopathic tests.
Despite these concerns, studies on electricity peak demand have attracted little attention.
Concerning studies on multimodality, Halliday emphasizes the importance of maintaining language itself "at the centre of attention, as being in some way the key" (p187).
It should be mentioned that there are other important approaches concerning studies on managerial work, such as Kotter (1982) regarding work agenda and leadership; Nadler et al. (1994) on organizational modelling; and Stewart (1963 , 1967 1982) on demands, restrictions and choices in managerial work.
Caution should be taken concerning studies on mice, as ovariectomy procedures can result in incomplete removal of the host ovary.
Therefore, a selection bias may exist concerning studies on ICU admission delays, as these delays could have been reported as ED discharge delays.
Concerning studies on health inequalities in Germany, educational level is widely accepted to be the most important indicator of SES, mainly for two reasons: Educational level is crucial for future occupation, and educational level rarely changes after 20 years of age.
The results described so far concern studies performed on the transcription, post-transcriptional modification and catalytic activities (when assayed under optimal conditions) of the glycolytic enzymes.
To cope with this concern, studies have focused on the exploitation of actinobacteria from unexplored environments and actinobacteria symbionts of plants and animals.
