preferred_name: Markedly reduced or undetectable rod responses seen on electroretinography (ERG)
preferred_name_lc: markedly reduced or undetectable rod responses seen on electroretinography (erg)
label: Markedly reduced or undetectable rod responses seen on electroretinography (ERG)
label_lc: markedly reduced or undetectable rod responses seen on electroretinography (erg)