"additional key information" is correct and usable in written English.
You can use it to refer to information that is necessary, relevant, or important, particularly in a situation where there is a lot of other information. For example: "We need to gather all of the additional key information before we make a decision on the project."
While the focus of this study has been the biochemical relationship between nmt55/p54nrb and tumor hormonal status, a more expansive study correlating nmt55/p54nrb protein expression with various breast tumor clinicopathological characteristics may provide additional key information.
Unfortunately, as a condition for participation in the study, the U.S. EPA kept undisclosed the identity of the treatment plant and additional key information (including sludge treatment systems) related to the biosolids samples.
Unfortunately, as a condition for participation in the study, the U.S. EPA kept undisclosed the sampling locations and additional key information on the biosolids samples analyzed, including the sludge treatment systems employed, population served by the plant, etc.
Interestingly, MEEG localization using cMEM showed good performance in separating the two sources with the help of additional key information brought by MEG that was nicely taken into account with the MEM fusion framework (Figs. 10, 12).
An additional key informant questionnaire sought information about access to health services in each cluster.
In the questionnaire, respondents were asked again to provide contact information for additional key informants within the same country.
During the interview process one additional key informant was added through snowball sampling, increasing the accrued number of key informants to 18. Refer to Table 2 for additional key informant information.
Investigators were contacted and asked to supply additional data when key information relevant to the meta-analysis was missed.
Another explanation for the missing effect of the "+" in 2D+ may be that the students were exclusively occupied with trying to understand the CT images, and thus were not able to include the given information of the additional "key views" in their decision making.
Additional file 1: Table S1 outlines the key information for each of the studies included in this review.
When key information for meta-analysis was missing, we contacted the researchers of selected studies for supplying additional data.
