How do I fetch time series for ADHD and other mental disorder datasets

I fetched time series for preprocessed Abide Dataset. Now I want to fetch time series for other preprocessed dataset using nilearn. How do I do that ?
Can someone guide me on how to fetch time series from functional files ?
Also if there is some other medical data available for time series which does not require any preprocessing please reply. It will be a lot of help.

These time-series have been specially devised and hosted for nilearn. There is no generic way of downloading preprocessed timeseries. You will have some luck finding interesting data that has been preprocessed on, but it will require some manual intervention to download it.

Can we fetch ADHD time series data using nilearn ?