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Many residency programs for obstetricians and gynecologists are in a risky position, caught between state abortion bans and accreditation requirements.

Stories about your health and possibility of a breakthrough and the fight against alzheimer's. it is bringing a huge buzz in the medical world. >> new study shows a spinal fluid test can diagnose the disease with near 100% accuracy. we talked about it yesterday. there's still a lot of questions to be answered. let's bring in the man who can answer these questions. our chief medical correspondent dr. sanjay gupta who just happens to be -- we have him as a neurosurgeon. have you done hundreds of spinal tap procedures yourself. show us how it works. >> yeah. this is the procedure people are talki...

Through the glass might explain it. >> but i think these are folks that have extreme anger issues. this is not an isolated case, what this woman did. you talk about that half-open can of beer. she had been drinking and we know that's a deadly combination. that's why we don't like people to drink and drive. we know when people leave a party and they've just been a little bit tipsy they tend to act out their rage. instead of going through the fantasy. so this guy is a folk hero. let's live vicariously through him. but for heaven's sakes, folks, don't repeat what he did because it is bad behavior...

Doctors he may refuse to write you a prescription no matter how much you're hurting. small town america with a big problem -- pill poppers. >> i didn't really realize how bad it was gettingful after i had gotten out of college. >> reporter: danielle grew up in eastern kentucky. her father was a doctor who like other doctors in this part of the country watched prescription drug abuse spiral out of control. in december, things came to a head here in kentucky in this town where the population is 792. in this clinic, danielle's father refused to prescribe painkillers for a man he suspected was an ...

Painkillers for a man he suspected was an addict. police say that man left angry and came back with a gun. >> my dad was writing in the chart at the nurse's station and someone heard my dad say, "you don't want to do this. i take care of a lot of elderly people." and he said, "well you didn't help me." and that's when he shot him. >> reporter: the doctor's murder didn't come as a shock to dr. david greene. he works at a family practice clinic. addicts often come to his clinic to shop for doctors. they use every trick in the book to get him to prescribe prour l f powerful pain medication. it ca...