31. Much research has been done on these types of trauma in childhood, and the adult sequelae of those. 32. He also described the first tracheotomy to be performed on a alimentary tract, apparently with no further sequelae . 33. These delayed neurological sequelae may occur in up to 50 % of poisoned people after 2 to 40 days. 34. Infection in swine is asymptomatic, except in pregnant sows, when abortion and fetal abnormalities are common sequelae . 35. The sliding uncus syndrome represents uncal herniation without alteration in the level of consciousness and other sequelae mentioned above. 36. The pathologic sequelae of maternal infection during gestation have been described ( see the section on clinical signs ). 37. As of 2007, the prospects for learning the sequelae of this disaster do not appear to be bright. 38. An organisation that treats infants and mothers suffering from sequelae , caused by alcohol and drug addiction during pregnancy. 39. The potential for significant psychological sequelae after indirect exposure to oil spills and other environmental disasters has been well documented. 40. Early signs of perforation were present in only 51 % of perforation claims, whereas late sequelae occurred in 65 %.