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2. Motor neurone;Cumings, J.N.
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4. The prognosis of motor neuron disease in Nigerian Africans. A prospective study of 92 patients;Brain,1974
5. Motor neuron disease;Peiris, J.B.; Seneviratne, K.V.; Wickremasinghe, H.R.; Boralessa, H.; Chandrasekara, M.A.,1976