I am a Ph.D scholar from PDU.very new to this field Looking forward early stages finding AD and comparison of AD related diseases. i dont know how to get relevant data for my work and which kind of data i have to take......
I am not sure exactly what you are looking for, but you can apply for access to the ADNI data (http://adni.loni.usc.edu/data-samples/access-data/) to make use of data that have already been collected. If you haven't already done so, I recommend reviewing the ADNI website to find out more about the study and whether or not it will help you in your research.
The data you are seeking may be avaialable. Its important for you to fully understand ADNI, go to ADNI-info.org and read the Impact of ADNI (Weiner et al)