dr. david joplin.e's the program director of the thoracic oncology lab at th university of california san francisco. and you started to talk about a lotf changes, improvementsand ways of treating lung disease. >> well, it's happening for lung disease, for biology in general, we are with precision medicine which is a buzz word. it hasn't quite lived up to the excitement yet, but it it wil it's just a matter of time and technogy and that is the idea of understanding whether it's a cancer of the lung or the colon or the breast and not of the organ and the pathways and the gnaling and the stem cell it came from and t carcinogens and other exposuress we as other diseases and emphysema and we cannterrogate these issue fishes and if you, god forbid, are diagnosed with a cancer and it is so important because we can learn so much about the tumor and direct and then guide the therapy based on that. >> you can design a therapy just for that particular tumor? >> right. exactly, so the excitement around these desig

david: janis joplin, jerry garcia, the grateful dead, the jefferson airplane, they were all going to the clinic for their own needs. janis joplin would over-dose and dr would be called in the middle of the night, he'd run out and save her, save her life literally, he did more than once. peter: it would be an unusual alliance from inside the neighborhood that would save dr. dave's life after he got a death threat from a drug dealer. dr. smith: there was a period of time in which our security force was the hells angels. this is what happened. they gave me the number, i called them up. "my name is dr. david smith. i'm medical director of the haight-ashbury free clinic." that's all that was needed. that was the introduction. then i explained the situation. he said, "we will take care of it." it was a weird world but that's the world." peter: over the next 40 years, smith would continue his work. the world would change how it saw him from outsider to insider. dr. smith: i got a call. it was from, like, a producer like you. and he said, "we heard you and the haight-ashbury free clinic were the architect of healthcare is a right not a privilege, and we thou