81.   The symptoms are caused by the toxins, which kill cells and cause fluids to accumulate in tissues.

82.   The virus causes flulike symptoms of fever, muscle aches, watery eyes and a persistent cough.

83.   The three or four months a year without hockey are bad for him, causing symptoms of withdrawal.

84.   The treatment not only causes symptoms like severe nausea and diarrhea but puts the patient at considerable risk of infection until the bone marrow regenerates.

85.   They can even cause similar symptoms.

86.   They might infect without causing any symptoms.

87.   They arise by similar mechanisms and can cause similar symptoms, though skin eruptions are more common in cats and dogs than sneezing or digestive distress.

88.   This hormone, which may cause symptoms of depression, is produced at increased levels in the dark.

89.   This raises the ultimate question of whether the symptoms caused the ills or the ills caused the symptoms.

90.   This very common condition, a form of endometriosis that occurs within the wall of the uterus, usually causes no symptoms.