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Whittaker, R.G., Schaefer, A.M., Taylor, R.W. et al. Differential diagnosis in ptosis and ophthalmoplegia: mitochondrial disease or myasthenia?. J Neurol 254, 1138–1139 (2007). https://doi.org/10.1007/s00415-006-0484-5
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DOI: https://doi.org/10.1007/s00415-006-0484-5