This perceived effectiveness bias may also be increased by social and economic barriers. The current context of medical cannabis access, including social stigma, high cost, and lack of universal insurance coverage can increase the patient selection bias. Self-selection bias is increased by the significant patient interest in medical cannabis as these patients must be motivated to access the non-traditional medication system.<\/p>\n
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All animals \u2014 even down to invertebrates such as insects and leeches \u2014 have them. Advocates say medicinal cannabis offers effective relief when other treatments are failing. But Australian guidelines say there’s limited evidence to support its use.<\/p>\n