http://www.ncbi.nlm.nih.gov/disease/Metabolism.html
Obesity Paroxysmal nocturnal hemoglobinuria Phenylketonuria Refsum_disease Tangier_disease Tay-sachs_disease METABOLISM is the means by
http://www.ncbi.nlm.nih.gov/disease/Brain.html
The nervous_system Alzheimer_disease Amyotrophic_lateral_sclerosis Angelman_syndrome Charcot-marie-tooth_disease Epilepsy Essential_tremor Fragile_x_syndrome Friedreich's ataxia Huntington_disease Niemann-pick_disease