LAUSR

C.C. acknowledges funding from the European Union's Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant agreement No. 664931. K.S. and C.C. acknowledge support from Swiss National Science Foundation Grants PP00P2_138979 and PP00P2_166159. RM acknowledges support from the ERC Advanced Grant 695671 >QUENCH> and from the Science and Technology Facilities Council (STFC). Z.-Y..Z. acknowledges support from ERC in the form of the Advanced Investigator Programme, 321302, COSMICISM. D.R. acknowledges support from the National Science Foundation under grant number AST-1614213 to Cornell University. M.A. acknowledges partial support from FONDECYT through grant 1140099. Y.P. acknowledges support from the National Key Program for Science and Technology Research and Development under grant number 2016YFA0400702, and from the Thousand Youth Talents Program of China. F.B. acknowledges support from the Science and Facilities Research Council (STFC). This publication is based on data acquired with the Atacama Pathfinder EXperiment (APEX) under programme ID 192.A-0359. APEX is a collaboration between the Max-Planck-Institut fur Radioastronomie, the European Southern Observatory, and the Onsala Space Observatory.