By Sharron SussmanLittle Gabrielle, three and a half, sat mutely on the examining table, watching my every move. Her legs dangled over the edge of the paper-covered vinyl, revealing a right knee that protruded about an inch farther than the left."You can fix her, can't you, Doctor?" her mother asked anxiously. "She's my dancer.""Her pediatrician was very concerned," I said, evading the question. In fact, her pediatrician had bypassed the formality of an orthopedic consult and brought the X-rays ...