preferred_name: [D]Sleep disturbances (& [hypersomnia] or [insomnia])
preferred_name_lc: [d]sleep disturbances (& [hypersomnia] or [insomnia])
label: [D]Sleep disturbances (& [hypersomnia] or [insomnia])
label_lc: [d]sleep disturbances (& [hypersomnia] or [insomnia])