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+Tabix indexes a TAB-delimited genome position file in.tab.bgz and
+creates an index file in.tab.bgz.tbi when region is absent from the
+command-line. The input data file must be position sorted and
+compressed by bgzip which has a gzip like interface. After indexing,
+tabix is able to quickly retrieve data lines overlapping regions
+specified in the format "chr:beginPos-endPos". Fast data retrieval
+also works over network if URI is given as a file name and in this
+case the index file will be downloaded if it is not present locally.