Summary
Effects of the parental age, birth order, sib size and the interval between the birth of a case and of his immediately senior sib were evaluated in 309 cases of motor neuron disease whether they are related with subsequent development of the disease. The spouses were used as the controls. The results were negative.
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Kondo, K., Fujiki, K. Effects of parental age and birth order in motor neuron disease. Jap J Human Genet 29, 45–50 (1984). https://doi.org/10.1007/BF01876757
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DOI: https://doi.org/10.1007/BF01876757
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