Evidence could not be grouped and analysed using meta-analysis due to heterogeneity of samples, methodology, interventions and outcomes (see Additional file 1).
General methodological limitations, including sampling methodology, retrospective study design, and terminology, have been discussed previously [ 2].
This hot spot sampling approach could have been considered as an alternative sampling methodology.
Further information about the YouGov sampling methodology is here, here, and here.
Information about sampling methodology can be found here, here and here.
It is not a case of anyone trying to limit the different types of data that are collected, but of ensuring sufficient consistency of collection and sampling methodology.
Groshek J, Guo L, Cutino C and Elasmar M (2015) A Sample Methodology for Extracting and Interpreting Country Concept from Social Media Users and Content.
Since 2000, more than 2,400 health care, environmental and technology professionals have met in panels for hundreds of hours to work out such details as sampling methodology, data collection and privacy protection.
No biases in past sampling due to choice of sampling locations or sampling methodology were evident.
Finally, two simulation and one experimental examples were used to demonstrate the sampling methodology.
An adaptive importance sampling methodology is proposed to compute the multidimensional integrals encountered in reliability analysis.
