In order for all of the clones to have been exact copies of each other, the egg cells would have had to have come from the same female donor. (space.com)
The researchers found that recipients of female donor red blood cells were associated with an eight percent increased risk of death (from any cause) per unit transfused compared with recipients of male donor red blood cells. (sciencedaily.com)
For example, for a recipient that received six units of red blood cells, this would translate into an associated risk of death of 36 percent for recipients of all - female donor blood compared to 27 percent for recipients of all - male donor blood one year later. (sciencedaily.com)