Ahs/rcrct: Oneand two sample problems are considered which are divided into subproblems, for each of which a separate rank statistic is obtained. The best combination of these statistics is then compared to the ordinary undivided rank statistic. One easily sees that, under natural conditions, splitting causes no first order efficiency loss. Hence it becomes interestmg to derive second order res...

There is compelling evidence that micronutrient deficiencies can profoundly affect immunity; micronutrient deficiencies are widely seen in HIV, even in asymptomatic patients. Direct relationships have been found between deficiencies of specific nutrients, such as vitamins A and B12, and a decline in CD4 counts. Deficiencies appear to influence vertical transmission (vitamin A) and may affect pr...

The application of Hilberman's theorem to construct a simple proof of a theorem on semi-indefinite networks is discussed.

the diagnosis of celiac disease (cd) relies on the concordance of pathological, serological, genetic and clinical features. for this reason, the diagnosis of cd is often a challenge. seronegative celiac disease (sncd) is defined by the negativity of anti-tissue transglutaminase antibodies in the presence of a positive histology on duodenal biopsy samples, i. e. inflammatory infiltrate of intra-...