the tests found no sign of lymphoma , but confirmed franciss diagnosis of lead poisoning , with blood lead concentrations in the encephalopathogenic range which probably explains why i dont remember very much about the time i spent in hospital having intravenous chelation therapy , amid the continual coming and going of other patients of all different ages , nationalities , shapes and sizes , and with a variety of health problems : a stroke , an infected cat bite , a fractured shoulder , an adverse drug reaction .