TABLE 2:

Clinical symptoms

Children	No.
With mitochondrial dysfunction	22
Cognitive delay	15
Dystonia	6
Nonfebrile seizures	6
Severe malaise	3
Nystagmus	2
Other	4
Without mitochondrial dysfunction	27
Neurologic symptoms	14
Cognitive delay	5
Nonfebrile seizures	3
Repeated febrile seizures	2
Dystonia	2
Nystagmus	1
Acute idiopathic polyneuritis	1
Other	2
Persistent biochemical perturbations	7
Asymptomatic	6