label: AFF2 (ALF transcription elongation factor 2 [FMR2]) (eg, fragile X intellectual disability 2 [FRAXE]) gene analysis; characterization of alleles (eg, expanded size and methylation status)
label_lc: aff2 (alf transcription elongation factor 2 [fmr2]) (eg, fragile x intellectual disability 2 [fraxe]) gene analysis; characterization of alleles (eg, expanded size and methylation status)