E. Nelson, P. van Dokkum, I. Momcheva, G. Brammer, S. Wuyts, M. Franx, N. Schreiber, K. Whitaker, and R. Skelton. (2015)cite arxiv:1511.04443Comment: Submitted to ApJ Letters. Fig. 2. shows measured radial Balmer decrement profiles. Fig. 3 shows inferred dust gradients. Fig. 4 shows dust-corrected radial profiles of star formation and the likely growth of bulges in high mass galaxies through in-situ star formation.