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    Going Beyond Counting First Authors in Author Co-citation Analysis

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    The present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed

    Hepatocellular carcinoma and non-alcoholic fatty liver disease: a dangerous liaison

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    e1299-Hepatocellular carcinoma and non-alcoholic fatty liver disease-a dangerous liaisonLiver cancer is one of the most frequent malignancies in the world, and its incidence rates are on the rise. Due to the global epidemic of metabolic syndrome, the incidence of hepatocellular carcinoma (HCC) secondary to non-alcoholic fatty liver disease (NAFLD) is increasing, contrary to viral forms. Characteristically NAFLD-related HCCs tend to occur at the earlier stages of liver disease, while often the diagnosis of neoplasia occurs later. They also affect an averagely older population, generally with a significantly higher number of co-morbidities. For these reasons, curative treatments are seldom applicable. Therefore, this work aims to illustrate the current state of knowledge on the NAFLD-related HCC and to underline the known pathogenetic mechanisms
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