tokens: We thank an anonymous referee for a prompt and positive report. We thank the Observatoire de Haute Provence for assistance with the T-193 telescope and the SOPHIE instrument. We warmly thank John Hillier for making the code CMFGEN available to the community and for constant help with it. L.M. acknowledges support from the Fonds National de la Recherche Scientifique (F.R.S.-F.N.R.S.) and through the ARC grant for Concerted Research Actions, financed by the French Community of Belgium (Wallonia-Brussels Federation).
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