The lack of original data restricted an adequate estimation of the age effect on PRP.
The study of reaction-system topology (the set of all participating reactions) has long been restricted, by lack of data, to small subsystems.
Another limitation of this review is the lack of data reported by the trials, which restricted our subgroup analyses.
The lack of available information on missing data restricts our ability to generalise our findings to pupils unable or unwilling to participate.
Because of this lack of data, some epidemiologic studies of PM2.5 have restricted their health effect analyses to populations near SAM sites (Dockery et al. 1993; Miller et al. 2007), whereas others have estimated exposures using concentrations averaged across metropolitan areas (Pope et al. 1995, 2002, 2004).
The lack of data available on the magnitude of risks restricts investment, as performance data is required for investors to undertake robust risk analysis.
The analysis focuses on EU countries and spans the 1980 2010 periods, although lack of data availability for some countries and variables restricts the sample.
The lack of data in many components of malaria transmission has restricted modelling efforts to a regional scale, since a significant pool of data is needed to test and fit the different sets of parameters.
Furthermore, lack of spatially resolved daily PM2.5 concentration data restricts these studies to populations surrounding monitoring sites, which may not be representative of the population as a whole.
Furthermore, lack of spatially resolved daily Ta concentration data restricts these studies to populations surrounding monitoring sites, which may not be representative of the population as a whole.
Due to a lack of data on outcomes for patients with primary adenocarcinoma, the model was restricted to anal cancer patients with squamous cell carcinoma.
