I am trying to locate a particular dataset from Peking University in which children were scanned twice, on and off medication (as described below). I figured it referred to Peking_2.001.001.tar.gz, but there's just one session for each subject in this dataset. Does anyone know where to find this "dataset 2"?

"Note: For dataset 2, children with ADHD were scanned twice, in a double-blinded, randomized, counterbalanced way. The two scans were at least 2 days apart, and each scan was taken 1 hour after either 10mg MPH administration or placebo (Vitamin B6, 10mg). All the patients had not received stimulant treatment for at least two days before the first scan, and were asked not to take any stimulant between two scans. The control boys were scanned once without MPH or placebo taken for ethical reasons. Only placebo scans were used for the present study."