The methodological quality of this case study could also be improved with more complete information on the designing, sampling, and implementation procedures of the interviews.
The topics in this article describe the concepts of sampling techniques and also detail essential methodologies and related issues; these include sample design and implementation, five basic sampling methods, two types of errors in survey data, and weighting the samples.
A selection of recent technical advances and new applications, the challenges of sample preparation and implementation of new technical developments are discussed, as well as the future directions of technology that is rapidly gaining a foothold in the contemporary biochemistry laboratory.
Sample recruitment and implementation was carried out in collaboration with PG, PT and AR.
Separate analyses were performed to assess the impact of omitting the 1-h blood sample and the implementation of the BM correction in centres where this was not current practice, i.e., in centres either applying the Chantler correction or using no correction factor.
The trainings included classroom sessions on study objectives; methods, including survey design, sampling, content, and implementation; as well as ethics.
Depending on the sampling frame and implementation, surveys may be representative of the population or health service delivery environment, and national generalization is possible.
RB has contributed to the case record forms, is responsible for the sample size calculation and implementation of the trial data management using the ProMISe software.
However, sampling and its implementation possess different challenges like selecting appropriate samples and creating links between those samples.
After these preliminary studies, further research must be done, particularly those regarding the treatment of real wastewater samples and the implementation in a large-scale installation.
