Comment on "Principles of connectivity among morphologically defined cell types in adult neocortex" by Barth, A, Burkhalter, A, Callaway, E, Connors, B, Cauli, B, DeFelipe, J, Feldmeyer, D, Freund, T, Kawaguchi, Y, Kisvarday, Z, Kubota, Y, McBain, C, Oberlaender, M, Rossier, J, Rudy, B, Staiger, J, Somogyi, P, Tamas, G, Yuste, R