e ) cobalamins ( congenital intrinsic factor deficiency , cobalamin malabsorption , transcobalamin deficiency , methylmalonic aciduria ) f ) folic acid ( congenital folic acid malabsorption , formimino-transferase deficiency , methylenetetrahydrofolic reductase deficiency , lesch-nyhan syndrome ) ;
C0086024
cobalamins
C0042845
cobalamin