"to existing research" is grammatically correct and can be used in written English.
You can use it when talking about research that already exists or has previously been conducted. Here is an example: "According to existing research, the prevalence of mental health disorders is on the rise in developed countries."
The findings add to existing research that neonicotinoid pesticides are contributing to the decline in bee populations.
One of the biggest weaknesses in the administration's plan, the panel said, was the absence of any significant reference to existing research examining the potential effects of climate change around the United States.
So rather than give their money to existing research, they started the Sandler Program for Asthma Research, designed to ferret out scientists from other disciplines who might have new ideas and could be drawn into the field with the Sandlers' money.
In this section, we summarize the findings in comparison to existing research.
"It's a great location," says Cook, and not only because of its proximity to existing research and health care facilities.
Because it is a supplement to existing research grants, current MPS grant holders can apply at any time.
Our comparative analysis ensures better performance compared to existing research works.
This paper focuses on the concept of patent scope, and contributes to existing research in three ways.
According to existing researches and information, earth is a major building material and platforms, mounds, shafts, and terraces are integral architectural elements of the environment.
We believe that a more fruitful approach would be to try to adapt to existing research-related legislation in Member States with the most developed large-scale epidemiology.
A secondary goal was to classify existing research according to the three analytical levels of macro-, meso- and micro-level approaches and findings.
