"of existing studies" is correct and usable in written English.
You can use it when making reference to a variety of studies or articles that already exist. For example, "This new research builds on the findings of existing studies."
Homeopathy is not effective for treating any health condition, Australia's top body for medical research has concluded, after undertaking an extensive review of existing studies.
Nice's work in this area has unfortunately been plagued by a lack of good quality data and by the lack of existing studies.
Nick von Westenholz, chief executive of the CPA, said: "It is a selective review of existing studies which highlighted worst-case scenarios, largely produced under laboratory conditions.
The paper, published in the July issue of The Lancet Infectious Diseases, used statistical techniques to combine the results of existing studies and reach conclusions based on the larger sample that resulted.
A new appraisal of existing studies documenting the links between tiny soot particles and premature death from cardiovascular ailments shows that mortality rates among people exposed to the particles are twice as high as previously thought.
It was criticized by the same panel last February as lacking clear priorities and neglecting to take stock of existing studies pointing to risks posed by rising global temperatures.
The international review of existing studies, published in the Lancet Psychiatry journal on Wednesday, also found other prevention methods which encourage people to seek help or increase third-party intervention to be effective.
Now a systematic review of existing studies has found no evidence that the restrictions have any benefit for most healthy women and their babies.
We address the issue of existing studies of glass transformations.
The majority of existing studies on intergenerational relations in rural China are statistical surveys.
First, Sect. 2 presents a literature review of existing studies regarding vehicle crash severity modeling.
