The interpretation of any meta-analysis must be made within the context of its limitations, including study selection, publication bias, and variability in the methodological quality of the included studies.
However, the inability to replicate may also reflect differences in patient selection, publication bias, chance or low correlation of a marker with the outcome measure (Colhoun et al, 2003).
The first one, called S1-Preliminary Selection and Cataloging, selected publications by applying the following criteria using the digital library search: Date: from 1990, January 1st.
During the first stage of study selection, 319 publications were excluded based on title and abstract.
We used the DVV (data, visualization processing, view) taxonomy to classify a large unbiased selection of publications in the field.
40510_2013_38_MOESM1_ESM.docx Additional file 1: Protocols 1 and 2. The questionnaire for the initial selection of publications is shown.
While the main focus is design and optimization of processes for liquefaction of natural gas, a selection of publications considering optimization of other parts of the LNG value chain and optimization of other sub-ambient refrigeration processes is also included.
Study Selection: All publications found did undergo abstract screening.
29 Figure 1 shows the flow chart of the selection of publications.
After this further selection, 53 publications relevant to the topic at hand were included.
