I find from the evidence that Claimant, Mary Ann Speckhals, was born on May 23, 1965, and began work for Employer in October 1997 as a "patient services coordinator". I find that Employer is a benevolent organization which provides support to patients who are terminally ill with Amyotrophic Lateral Sclerosis, and to their families. This required Claimant to travel to Jefferson City, Springfield, Branson, Kirksville, and elsewhere to meet with patients, families and support groups, and to attend funerals. This required Claimant to drive quite a bit. Claimant estimated her driving at an average of 200-300 miles per week. Prior to working for Employer, Claimant had worked as a social worker in a nursing home, and as a home health social worker.
In 1996, Claimant began treatment with Dr. Jeffery Belden, her family physician, for migraine headaches. According to Dr. Belden's records, these were related to her menstrual cycle. They appeared to be well-controlled with medication, however, on an August 11, 1998, visit to Dr. Belden, Claimant reported worse headaches in the last month, or so, with frontal location with nausea, photophobia, and sometimes scotomata. On that date, Dr. Belden prescribed Naprosyn to be taken "during th