Chris Colwell, director of emergency medicine at Denver Health, has treated victims from two of the deadliest mass shootings in the U.S. He says he's deeply disturbed by how easy it is to get guns. Barry Gutierrez/for NPR hide caption

itoggle caption Barry Gutierrez/for NPR

Dr. Frank Dumont at his clinic in Estes Park, Colo. Barry Gutierrez for NPR hide caption

itoggle caption Barry Gutierrez for NPR

Group therapy is popular in mental health circles. Are group appointments for medical conditions worth a try? iStockphoto.com hide caption

itoggle caption iStockphoto.com

Posters like this one tell patients in New York City emergency rooms what to expect when it comes to painkiller prescriptions. New York City Health Department hide caption

itoggle caption New York City Health Department

It's unlikely that July patients are paying for residents' inexperience with their lives. iStockphoto.com hide caption

itoggle caption iStockphoto.com

Partnerships instead of short-term help: Jean Jumeau Batsch, an obstetrician-gynecologist in Port-au-Prince, Haiti, is collaborating with Dr. Ambereen Sleemi, from New York City, to build a training program for Haitian OB-GYNs. Courtesy of Dr. Ambereen Sleemi. hide caption

itoggle caption Courtesy of Dr. Ambereen Sleemi.

If you bought this 1954 Buick when it was new, the price was just about as mysterious as it is today for hip replacement surgery. Hugo90/Flickr hide caption

itoggle caption Hugo90/Flickr

A package of microwave popcorn promoting Johnson & Johnson's antipsychotic drug Invega back in 2008 would have been a no-no at many medical schools. Nurse Ratched's Place hide caption

itoggle caption Nurse Ratched's Place

Doctors' use of CT head scans for hospitalized patients didn't change when the prices were revealed at the time an order was being made. Wikimedia Commons hide caption

itoggle caption Wikimedia Commons

What's up, doc? How would you feel if your doctor shared a picture like this one? Dr. Ryan Greysen hide caption

itoggle caption Dr. Ryan Greysen

Redskins quarterback Robert Griffin III lays on the field after injuring his knee during an NFL playoff loss to the Seattle Seahawks on January 6. Griffin had knee surgery two days later. Richard Lipski/AP hide caption

itoggle caption Richard Lipski/AP