For years, Blake has suffered from a list of unrelated symptoms. He started experiencing erectile dysfunction in his early twenties, followed by repeated bouts of chest pain. Shortly after this, he began having weekly episodes of diarrhea. Most recently, double-blindness has been added to his list of ailments. Blake has gone from doctor to doctor, and none of them have ever found a physical cause for his illnesses. His newest doctor thinks he might suffer from Briquet's syndrome, which is also known as _____ pattern.