'Map our descriptor strings back to the IARC ones (comma-sep.).'

def iarc_deserialize(self, body=None):

    keys = self.to_keys()
    if body:
        keys = [key for key in keys if (body.iarc_name.lower() in key)]
    return ',    '.join((REVERSE_DESCS_V2.get(desc) for desc in keys))
