When dinosaurs roam the earth, these days, they often do it in wheelchairs. Just ask self-styled poliomyelitis-saurs Sherry Flansburg and Joan Bruhn, polio survivors whose increasingly weakened muscles, symptoms of Post Polio Syndrome, have forced them into wheelchairs recently, decades after contracting polio. Flansburg first heard she was a dinosaur about 20 years ago, around the time PPS began to be recognized in the medical community. "I had a very good doctor tell me that if you need something, Sherry, you let me know and we'll talk about it because you're a dinosaur, and they don't teach us how to...