tokens: We thank the anonymous referee for very useful comments and suggestion to improve this work. We acknowledge support from CONICYT-Chile grants, Basal-CATA PFB-06/2007 (DC, FEB, SS), FONDECYT 1141218 (FEB), PCCI 130074 (FEB), ALMA-CONICYT 31100004 (FEB), Gemini-CONICYT 32120003 (FEB), ‘EMBIGGEN’ Anillo ACT1101 (DC, FEB), the Ministry of Economy, Development, Tourism's Millennium Science Initiative through grant IC120009 awarded to The Millennium Institute of Astrophysics, MAS (FEB, SS), CONICYT-Chile through PCHA/Doctorado Nacional (2015-21151574) (DC), and by NASA through Herschel contracts 1427277 and 1454738 (SV). Optical observations were obtained with the Magellan/Baade as part of the program CN–2015A–129. We acknowledge NASA and Mikulski Archive for Space Telescopes (MAST) for the use of data retrieved from MAST.
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