Building on a survey of media institutions in eighteen West European and North American democracies, Hallin and Mancini identify the principal dimensions of variation in media systems and the political variables which have shaped their evolution. They go on to identify three major models of media sy[...]

Recent advances in skull base surgery are revolutionizing the field. Besides the critical location issue, the major problem in lateral skull base surgery is understanding the complex relations between the different structures of the region, requiring a deep knowledge of anatomy.
Here is a new ed[...]