What do A pos and C pos mean?
The # column is the rank of each listed entry for University of Texas Medical Branch — rank 1 means this entry is where University of Texas Medical Branch has the most articles or citations. A pos and C pos show the reciprocal: the position of University of Texas Medical Branch within that entry's own ranked list, by articles and citations respectively. A low value means University of Texas Medical Branch is among the most prominent contributors for that entry.