“When one hears hoofbeats, medical students are taught, one must think of horses, not zebras. But the doctor who sees my blood count will surely think of horses. He will arrive at a perfectly logical conclusion. It will no occur to him that, this time, it is truly a zebra galloping by.”

“When one hears hoofbeats, medical students are taught, one must think of horses, not zebras. But the doctor who sees my blood count will surely think of horses. He will arrive at a perfectly logical conclusion. It will no occur to him that, this time, it is truly a zebra galloping by.”

— Tess Gerritsen