i also want to acknowledge two of our health commissioners here: dan bernal and james loyce. thank you so much for being here and joining us on this special day. [applause] >> you know, it takes a village, and the city and county of san francisco, and especially the health department has been a really wonderful partner. and i want to acknowledge gary, who's here, the interim director, and i want to introduce to you dr. barry zevin who's a specialist for the san francisco department of public health. [applause] >> similmer down. thank you very much. the -- i'm a physician. i'm trained as an internal medicine specialist and an addiction medicine specialist. i reviewed the literature on things related to people who use substances. i've been involved in the harm reduction movement for 25 years. i've been treating patients who use drugs for 30 years. t the -- i have had numerous patients in the past 30 years die of overdose. i've had numerous patients die of substance use related disorders, preventible disorders. i have embraced the idea that we meet people where they're at, a ver