Launched for a third time by the Service Employees International Union-United Healthcare Workers West, Prop. 29 would add new rules on dialysis clinics. If approved, dialysis clinics would be required to have a physician, nurse practitioner, or physician assistant on site during all treatment hours, among other requirements. Opponents say Prop. 29 imposes unnecessary requirements and would cause clinics to shut down. 

Guest:  Kevin Stark, KQED science senior editor

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