>> no. no, there are no guarantees. look, in some ways we're pioneers, because we're at the very beginning. there's been very little stem cell therapy of this kind. and we don't really know it's out there. but it's an adventure. and for the -- and it's a wonderful feeling for the first time in literally decades. >> given you hope. >> but it's given hope, but it's a chance to be proactive. it's a chance to do something. >> meredith, he's such a gutsy guy. you know that, because you're married to him. he wrote this in one of his blogs. i've picked up the pieces and reinvented myself as physical deterioration redefined what i can do. friends are noted how many times i've been rein car natured. the freelance writer turned into an author. my trek has not been linear. but my parachute continues to open. it's a beautiful way of describing it.