How do I obtain permission for using already published data in other research papers?
In order to be able to reuse previously published data, you need to seek written consent from the original authors. This can be done by directly contacting the authors of the original research article. In addition, if the previously published research is covered by a Creative Commons or RightsLink license (which is usually mentioned by the journal), then such published data can be used by giving proper credit to the authors of the original research. This informative article will give you insights into the different types of licenses available for data sharing.