title: Effects of parental age and birth order in motor neuron disease.
mesh_terms: D000328:Adult; D001721:Birth Intervals; D001722:Birth Order; D005260:Female; D006801:Humans; D007564:Japan; D008297:Male; D008423:Maternal Age; D008875:Middle Aged; D009046:Motor Neurons; D009468:Neuromuscular Diseases / Q000209:etiology / Q000235:genetics*; D010331:Paternal Age