'show high concern' is a correct and usable expression in written English.
You can use it to indicate that someone is taking a situation seriously and expressing a great deal of care and caution. For example, "Given the current situation, we need to show high concern for the health and safety of the entire community."
More than half (54.3%, 840/1548) of the participants showed high concern, 43.7%(677/1548) showed a low level of knowledge, and 60.8%(941/1548) had taken minimal or no precautionary measures.
National polls show high environmental concern among minorities.
Our interviews with 50 boat operators and 150 tourists, during the period July to September 2012, also show the high concern about the water quality of the Sekoyer River.
The reported literature showed a high concern for bias and applicability.
Figure 1 shows that high concern was prevalent in more than one-half (54.3%) of all participants, with no differences between men and women (χ= 1.68, p = 0.64).
For instance, CIS committee members' discursive practices during this sub-period showed a high concern with the possible effects of such high standardization on users' day-to-day practices and on how end-users might react to these changes.
That is, both tools show high diversity also concerning dinucleotides.
Therefore, and in line with what we have learnt from our theoretical results, the subsidies are funded by those agents who show the highest concern for health; namely, (s^{g}_{2}) and (s^{b}_{2}).
Given the thalassemia literature which has emphasized the need for better education to improve adherence, we hypothesized that patients who viewed chelation as high necessity would show better adherence, and patients with high concern would show poorer adherence.
Though the models vary, they are united by the conviction that health policy is vastly under-covered by most news organizations at a time when polls show high levels of public concern about the cost, availability and quality of health care.
