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OBJECTIVE To estimate the occurrence and school-level clustering of drug involvement among school-attending adolescent youths in each of seven countries in Latin America, drawing upon evidence from the PACARDO research project, a multinational collaborative epidemiological research study. METHODS During 1999-2000, anonymous self-administered(More)
Wandering spleen is an unusual condition in children and is even more rarely diagnosed in the neonatal period. A case of splenic haemorrhage after dystocic birth in a newborn is reported. Before surgery, results of imaging studies were suggestive of a ruptured spleen. On laparotomy, a big haematoma surrounding a wandering spleen was found. Haemorrhage(More)
Web 2.0 tools have changed the relationship between users and libraries by improving the involvement of users in the libraries activities. To use such tools efficiently, it is essential to know if they are meeting user requirements and expectations, and how they could be improved to increase user satisfaction. The aim of this paper is to present a model to(More)
BACKGROUND & AIMS Albumin dialysis using molecular adsorbent recirculating system (MARS) is a new procedure for treating resistant pruritus from cholestasis, but it is usually published as a case report or a short series. Therefore, we analyzed patients with resistant pruritus treated with MARS from three centers, to assess the changes on pruritus and the(More)
Citation classics identify those highly cited papers which are an important reference point in a research field. To identify a paper as a citation classic we have to fix a citation threshold value. Usually, this threshold value should not be the same for all research fields because each field presents its respective citation pattern. Studies of citation(More)
Objectives: This article reports the first science mapping analysis of the social work field, which shows its conceptual structure and scientific evolution. Methods: Science Mapping Analysis Software Tool, a bibliometric science mapping tool based on co-word analysis and h-index, is applied using a sample of 18,794 research articles published from 1930 to(More)
Highly cited papers are an important reference point in a research field. H-Classics is a new identification method of highly cited papers that is based on the H-index and is sensitive to the own characteristics of any research discipline and also its evolution. Recently, Ho (Scientometrics 98(1):137–155, 2014) presented a study on highly cited papers in(More)
PURPOSE This study was designed to analyze the differences in central corneal thickness values determined with noncontact specular microscopy and scanning-slit corneal topography. The measurements were performed on the same eye. METHODS We analyzed the central corneal thickness values of 93 patients (n = 93) by means of noncontact specular microscopy(More)