Sheba

The 28-year-old said the complex operations on her hand and leg in Israel's Sheba Medical Center had gone "much better than expected".

Shiri's sister Dana Silberman-Sitton told reporters at the Sheba hospital in central Israel the family would "no longer accept uncertainty".

From Re'im, they were transferred by helicopter to the Sheba Medical Centre near Tel Aviv to be reunited with their wider families and receive further medical attention.

"The overall evidence still overwhelmingly sides with physical activity being neuroprotective," said Gardner, who is now at the Sheba Medical Center in Israel.

Sheba Medical Center in Ramat Gan, home to a major rehabilitation center, says it alone has treated about 60 amputees.