Problem about dataset from paper "Open Access Dataset for EEG+NIRS Single-Trial Classification"

[BossNP]

I downloaded the dataset according to the link which is provided from the paper "Open Access Dataset for EEG+NIRS Single-Trial Classification".

The problem is I cannot find data from ECG channels, which in the paper said it provided along with other signals (EEG/EOG/NIRS),

Could you give me information about this?