The rate and latency of star formation in dense, massive clumps in the Milky Way M. Heyer, R. Gutermuth, J. S. Urquhart, T. Csengeri, M. Wienen, S. Leurini, K. Menten and F. Wyrowski A&A, 588 (2016) A29 Published online: 14 March 2016 DOI: 10.1051/0004-6361/201527681