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tokens: We thank the anonymous referee for the very useful suggestions that helped us improve this work. R.H.B. acknowledges support by FONDECYT Regular project No. 1120668. A.R.L. is grateful for financial support from ALMA-CONICYT Fund, and Dirección de Investigación of Universidad de La Serena through project DIULS REGULAR PR13144. J.L.N.C. also acknowledges financial support from the ALMA-CONICYT postdoctoral program No. 31120026. M.S. acknowledges support from ESO-Chile Joint Committee and “Becas Chile de Postdoctorado en el Extranjero” project No. 74150088. V.F. acknowledges support from the ESO-Chile Joint Committee and DIULS. M.H. acknowledges the support of the Basal PFB-06 and the Milenio Milky Way Nucleus. We gratefully acknowledge use of data from the ESO Public Survey programme ID 179.B-2002, taken with the VISTA telescope, data products from the Cambridge Astronomical Survey Unit, and funding from the FONDAP Center for Astrophysics 15010003, the BASAL CATA Center for Astrophysics and Associated Technologies PFB-06, and the Millennium Institute of Astrophysics MAS. D.M. acknowledge financial support from CONICYT by Proyecto FONDECYT Regular No. 1130196. R.K.S. acknowledges support from CNPq/Brazil through projects 310636/2013-2 and 481468/2013-7. This research has made use of SIMBAD, VizieR, and “Aladin sky atlas” operated and developed at CDS, Strasbourg Observatory, France. Also, this research has made use of NASA’s Astrophysics Data System.