Working as a close research partner with her husband - medical pioneer and Nobel Prize winner Dr. E. Donnall Thomas - Dorothy (Dottie) Thomas helped establish bone-marrow transplants as a standard and successful treatment for many formerly incurable blood diseases such as leukemia.

Known as "the mother of bone-marrow transplantation," Thomas, 92, died Friday at her home near Seattle.

Though the necessities of her early working and family life precluded her from earning a medical degree, Thomas used her scientific knowledge and management skills to support every aspect of her husband's work and to shepherd the success of the transplant team at Seattle's Fred Hutchinson Cancer Research Center, which became the world's first bone-marrow transplant facility.

From the earliest days of the groundbreaking research, Thomas drew blood from patients, did lab work and edited every scientific paper her husband wrote, as well as those of the team of young medical hotshots he gathered at "the Hutch."

In addition, as chief administrator for Hutchinson's Clinical Research Division and the gatekeeper to her husband, she managed the people, the budgets and the schedules to keep the work on track.

Dr. Fred Appelbaum, Hutchinson's deputy director and 36-year colleague of the Thomases, said her husband "would not have been nearly as successful and productive had it not been for Dottie."

More than a million patients have had the bone-marrow treatment developed by the Thomases and their colleagues. Appelbaum estimates that about 70,000 bone-marrow transplants will be performed worldwide this year, about 500 at Hutchinson.

The cure rate for early-stage leukemia has risen to 80 to 90 percent, he said, while other blood diseases such as sickle-cell anemia and aplastic anemia have even higher rates.

The former Dorothy Martin grew up in Texas, graduating early from her San Antonio high school, a whip-smart, straight-A valedictorian.

She entered the University of Texas at Austin at 16, studying journalism and planning a career as a reporter, until a snowball fight changed her life's direction.

After a rare snowstorm on campus in the winter of 1940, the 17-year-old freshman threw a snowball that hit senior and chemistry major Don Thomas in the face.

"She claims she was throwing it at another fellow and hit me by mistake," he told The Seattle Times in a 1999 interview. "One thing led to another and we seemed to hit it off."

Three years later, she married Thomas and dropped out to follow him to Harvard Medical School, forming a life and work partnership that spanned 70 years until her husband's death in 2012, also at 92.

During the lean war years in Boston, Dottie Thomas trained as a medical technician while he got his degree.

"We had no financial support, she had to work," Don Thomas told The Times. "In retrospect, it's too bad, because she could have gone on to get her doctorate."

In those 1999 interviews, Dottie Thomas said that, yes, she would have loved to become a doctor herself, but "it wasn't feasible."

"You have to deal with the time you live in," she said.

In addition to her career and motherhood, Thomas was an accomplished outdoorswoman who spent many family vacations hunting and fishing with her husband in Montana and Alaska.

Accompanying Dr. Thomas to accept the Nobel Prize in Stockholm, Thomas connected with the shy Swedish King Carl Gustaf by chatting about her prowess with a hunting rifle.

Thomas is survived by two sons, Dr. E. Donnall Thomas Jr. of Montana and Jeffrey Thomas of Mill Creek; her daughter, Dr. Elaine Thomas of Albuquerque, N.M.; eight grandchildren; and a great-grandchild.