Henry Mak

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PURPOSE To investigate whether quantitative MRI measures of cervical spinal cord white matter (WM) using diffusion tensor imaging (DTI) in neuromyelitis optica (NMO) differed from controls and correlated with clinical disability. MATERIALS AND METHODS Ten referred patients and 12 healthy volunteers were imaged on a 3 Tesla scanner and patients were(More)
for helpful discussions. ABSTRACT We study the monopolistic …rm's selling mechanism when consumers are required to learn how to use products. We compare the case where the …rm helps consumers learn the product features and bene…ts, to the case where the …rm does not provide any help. In the latter case, the …rm may design the products to induce(More)
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