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With his wife and child close at hand, Army Maj. Chad Wriglesworth battled skin cancer for more than a year before dying at age 37.

"It was long and painful and awful," said Aimee Wriglesworth, who believes the cancer resulted from exposure to toxic fumes in Iraq. Yet the 28-year-old widow from Bristow, Virginia, seized a chance to recount the ordeal and its aftermath to a researcher, hoping that input from her and her 6-year-old daughter might be useful to other grieving military families.

"To be able to study what we felt and what we're going through — maybe this will help people down the line," Wriglesworth said.

By the hundreds, other widows, widowers, parents, siblings and children are sharing accounts of their grief as part of the largest study ever of America's military families as they go through bereavement. About 2,000 people have participated over the past three years, and one-on-one interviews will continue through February.

The federally funded project is being conducted by the Center for the Study of Traumatic Stress at the Maryland-based Uniformed Services University of the Health Sciences. The study is open to families of the more than 19,000 service members from all branches of the military who have died on active duty since the terror attacks of Sept. 11, 2001, regardless of whether the death resulted from combat, accident, illness, suicide or other causes.

Aimee Wriglesworth is hopeful that the study will provide new insight on how best to support young families like hers.

"A lot of things that are helping us now come from Vietnam, Korea, World War II," she said of existing assistance programs. "But now it's a whole new world of military losses. Studying us is really important."

About half of the participants are providing saliva samples that will be used for genetic research, aimed at determining if certain genetic makeups correlate with the duration of the grieving process and the levels of stress and depression experienced as it unfolds. Previous research suggests a certain gene variation is associated with greater risk of "complicated grief," especially in women.

The leader of the study, Dr. Stephen Cozza, said a final report isn't expected until 2017, and he is encouraging more survivors to sign up for interviews before the cutoff date in late February.

"Our interest is understanding what these families need," he said. "Recognizing the need will allow us to make better policy recommendations as to what sort of services would be appropriate for them."

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