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Researchers have identified waves of proteins in blood that peak at three distinct stages of life. What do the findings mean for aging? ER Productions Limited/Getty Images hide caption

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ER Productions Limited/Getty Images

Scientists Find Surprising Age-Related Protein Waves In Blood

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Dr. Laurie Punch, a trauma surgeon at Barnes-Jewish Hospital in St. Louis, is adamant that violence is a true medical problem doctors must treat in both the operating room and the community. Whitney Curtis for KHN hide caption

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Whitney Curtis for KHN

Hair dyes and straighteners contain chemicals that are being studied for their health effects. Srdjanpav/Getty Images hide caption

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Srdjanpav/Getty Images

Truvada is one of two HIV prevention drugs that will be available for free to qualified individuals. BSIP/Universal Images Group/Getty Images hide caption

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BSIP/Universal Images Group/Getty Images

Dr. BJ Miller's new project, the Center for Dying and Living, is a website designed for people to share their stories related to living with illness, disability or loss, or their stories of caring for someone with those conditions. Simon & Schuster hide caption

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Simon & Schuster

After A Freak Accident, A Doctor Finds Insight Into 'Living Life And Facing Death'

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Presidential candidates recognize health care is a key voting concern. But polled Democrats don't yet agree on the best solution. Toni L. Sandys/The Washington Post/Getty Images hide caption

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Toni L. Sandys/The Washington Post/Getty Images

The Cambria factory in Minnesota manufactures slabs of engineered quartz for kitchen and bathroom countertops. If businesses don't follow worker protection rules, cutting these slabs to fit customers' kitchens can release lung-damaging silica dust. Cambria hide caption

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Cambria

'There's No Good Dust': What Happens After Quartz Countertops Leave The Factory

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Hokyoung Kim for NPR and KHN

When Teens Abuse Parents, Shame and Secrecy Make It Hard to Seek Help

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A box of vaping products confiscated from students or thrown away at Boulder High School. The school's assistant principal collects items for later delivery to the county's hazardous waste facility. John Daley/Colorado Public Radio hide caption

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John Daley/Colorado Public Radio

Don't Toss That E-Cig: Vaping Waste Is A Whole New Headache For Schools and Cities

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Years ago, Portia Smith (center) was afraid to seek care for her postpartum depression because she feared child welfare involvement. She and her daughters Shanell Smith (right), 19, and Najai Jones Smith (left), 15, pose for a selfie in February after makeup artist Najai made up everyone as they were getting ready at home to go to a movie together. Tom Gralish/Philadelphia Inquirer hide caption

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Tom Gralish/Philadelphia Inquirer

Black Mothers Get Less Treatment For Their Postpartum Depression

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We're tethered to our brothers and sisters as adults far longer than we are as children; our sibling relationships, in fact, are the longest-lasting family ties we have. Katherine Streeter for NPR hide caption

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Katherine Streeter for NPR

Jennifer Brooks, who had repeatedly visited the emergency room at Baptist Memorial Hospital in Memphis, Tennessee, was sued by Southeastern Emergency Physicians for $8,500 in unpaid medical bills. Andrea Morales/MLK50 hide caption

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Andrea Morales/MLK50