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There is not an example in SDTM IG 3.3 what exactly does LBSTREFC should be populated with apart from its label - Reference Result in Standard Format. We already have variables - LBSTRESC & LBSTRESN - Captures values in standard format, along with LBSTNRLO, LBSTNRHI, LBSTNRC - Reference Range values in standard formats. Does LBSTREFC value be copied from LBSTRESC ? If so, then What exactly is purpose of this ‘new’ expected variable?