“…The indicator for LEX at birth was selected based on the analysis by Refs. [ 5 , 27 , 29 ]; ECD [ [25] , [26] , [27] ]; HUC [ 36 , 49 , 50 ]; AIP [ 10 , 29 , 54 ]; REC [ 31 , 59 , 60 ] and NRR [ 38 , 45 ]. Following these prior studies, equation (1) will be used to determine the function of the antecedents of LEX.…”