What substances were the researchers able to identify using RPSTREAM, and what was the average duration of the identified substanceuse episodes?
RPSTREAM was able to find and identify episodes of cocaine and cannabis use. The episodes were, on average, about 53 minutes in duration.
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### Instruction:
What substances were the researchers able to identify using RPSTREAM, and what was the average duration of the identified substanceuse episodes?

### Input: Not applicable

### Response:
RPSTREAM was able to find and identify episodes of cocaine and cannabis use. The episodes were, on average, about 53 minutes in duration.<|im_end|>