"She's just lucky in so many ways," said UCLA's Nuwer. "The breaks have been in her favor. That's not to say they'll continue to be in her favor."
Many factors key to Giffords' survival, docs say →
"So far, she's passed with flying colors of each stage" of her recovery, said neurologist Dr. Marc Nuwer of the University of California, Los Angeles, who is not involved in the congresswoman's treatment.