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