What are the online blood testing services that allow to pick and choose exactly what test you want?
How accurate is dermoscopy to predict if a skin lesion is a basal cell carcinoma (BCC), and if it is, whether it is superficial or aggressive form?
Are H. Pylori infections the most common cause of both gastric and duodenal ulcers? Is the urea breath test a useful diagnostic for both kinds?
How to evaluate the results of diagnostic studies: how to prove that new method is better than gold standard?
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