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https://s3.amazonaws.com/academia.edu.documents/42747511/CBEForMSBladderDysfunction.pdf?response-content-disposition=inline%3B%20filename%3DAn_open-label_pilot_study_of_cannabis-ba.pdf&X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=AKIAIWOWYYGZ2Y53UL3A%2F20191225%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Date=20191225T204641Z&X-Amz-Expires=3600&X-Amz-SignedHeaders=host&X-Amz-Signature=2239b2e9b36c2dd4c4f1778edb5b0bd829ed43924a0ec4eaa9ae700eb582fb82