2016i-603 ayahuasca banisteriopsis ceremonialbehavior collectionandpreservation colombia drugandnarcoticcontrol ethnobotany hallucinogenicdrugsandreligiousexperience hallucinogenicplants hallucinogens healing indiansofsouthamerica medicine ritesandceremonies santodaime(cult) shamanism sociallifeandcustoms therapeuticuse