preferred_name: Mental retardation (IQ 50-60 combined Griffiths and Stanford-Binet scale)
preferred_name_lc: mental retardation (iq 50-60 combined griffiths and stanford-binet scale)
label: Mental retardation (IQ 50-60 combined Griffiths and Stanford-Binet scale)
label_lc: mental retardation (iq 50-60 combined griffiths and stanford-binet scale)