This Saturday, Dec. 2, 2017 photo provided by Jay Konduros, left, shows him and his brother, Bill, at Jay's home in Cambridge, Ontario, Canada. The brothers, who have hemophilia, were involved in a gene therapy study for their condition. Before the treatment, "Even something as innocuous as reaching over your head to get something out of a closet, or reaching down to tie a shoe" could trigger trouble, Bill said.
This Saturday, Dec. 2, 2017 photo provided by Jay Konduros, left, shows him and his brother, Bill, at Jay's home in Cambridge, Ontario, Canada. The brothers, who have hemophilia, were involved in a gene therapy study for their condition. Before the treatment, "Even something as innocuous as reaching over your head to get something out of a closet, or reaching down to tie a shoe" could trigger trouble, Bill said. Courtesy Jay Konduros via AP)
This Saturday, Dec. 2, 2017 photo provided by Jay Konduros, left, shows him and his brother, Bill, at Jay's home in Cambridge, Ontario, Canada. The brothers, who have hemophilia, were involved in a gene therapy study for their condition. Before the treatment, "Even something as innocuous as reaching over your head to get something out of a closet, or reaching down to tie a shoe" could trigger trouble, Bill said. Courtesy Jay Konduros via AP)

Gene therapy shows promise against blood-clotting disease

December 06, 2017 10:39 PM

UPDATED December 06, 2017 10:41 PM

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