Melvin Wong

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Patent foramen ovale has been suggested to be a risk factor for cryptogenic stroke by means of paradoxical embolism. The data, however, are complex, conflicting and largely unavailable. In this review, we attempt to summarize the existing data separately for the questions of whether patent foramen ovale is associated with cryptogenic stroke and whether it(More)
BACKGROUND Faecal microbiota transplantation (FMT) has become routine in managing recurrent C. difficile infection (CDI) refractory to antibiotics. AIM To compare clinical response and improvements in colonic microbiota diversity in subjects with recurrent CDI using different donor product. METHODS Seventy-two subjects with ≥3 bouts of CDI were(More)
Conventional methods of estimating latent behaviour generally use attitudinal questions which are subjective and these survey questions may not always be available. We hypothesize that an alternative approach can be used for latent variable estimation through an undirected graphical models. For instance, non-parametric artificial neural networks. In this(More)
In this paper, we present machine learning approaches for characterizing and forecasting the short-term demand for on-demand ride-hailing services. We propose the spatio-temporal estimation of the demand that is a function of variable effects related to traffic, pricing and weather conditions. With respect to the methodology, a single decision tree,(More)
While improved medical management may partially explain the impressive decline in mortality from stroke in the last three decades, clinicians have been limited in their ability to reduce the staggering neurologic morbidity in survivors. Many proposed interventions have had promising beginnings in the laboratory and have been employed with enthusiasm in(More)
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