PITTSFIELD, Mass. – Kathy Mazzeo had been stressed for years over the specter of multiple sclerosis. More than a dozen years ago, she’d started to exhibit some of the symptoms of MS: the feeling of pins and needles on her extremities, some difficulty maneuvering, vision problems. She was haunted by the memory of a little girl with the disease whom her mother had cared for when Mazzeo was younger.
