A young doctor and his wife had just moved to the mountains of eastern Kentucky, near the border of West Virginia. The small town was nestled among the coal mines of the region. Nearly all of his patients would be coal miners or family members of a miner. Bill would practice family medicine. His wife, a veterinarian, hoped to build a small-animal practice.
Liz McWherther, the forty-seven-year-old wife of a miner, came to see the young doctor. Over several weeks, she had developed a curious set of complaints. Each morning she woke with a dry mouth and slurred speech. She also noted blurred vision and difficulty urinating. Within a couple of hours of waking, she was completely free of any symptoms. These symptoms had been occurring each morning and going away by afternoon.
Liz had had a series of tests done by the previous physician, but none of these tests were abnormal. The physical examination by Dr. Hueston was entirely normal. She denied drinking alcoholic beverages or using illicit drugs. Hueston had briefly considered some unusual response to marijuana or other drugs that were prevalent in the area. Liz had not been down in the mines, nor did her husband bring back anything unusual into the house.