Table 2 Search terms used to obtain the articles used from the PubMed and Ovid Embase databases

#1

"Organoids"[Mesh] OR organoid* [tiab] OR spheroid* [tiab] OR self-organised [tiab] OR self-organized [tiab]

Organoids/

#2

("Brain"[Mesh] OR brain* [tiab] OR cortica* [tiab] OR cortex [tiab] OR cerebral* [tiab] OR telencephal* [tiab] OR diencephal* [tiab] OR mesencephal* [tiab] OR rhombencephal* [tiab] OR cerebel* [tiab] OR 'spinal cord' [tiab] OR forebrain [tiab] OR hindbrain [tiab] OR midbrain [tiab])

(Brain organoid* or cerebr* organoid* or cerebel* organoid* or ((forebrain or hindbrain or midbrain or cortical* or cerebel* or cerebr*) adj organoid*) or ((brain or cerebr* or cerebel* or cortical*) adj spher*) or ((telencephal* or diencephal* or rhombencephal* or mesencephal*) adj organoid*) or ((self?organi?* or "self organi?*" or guided) adj2 organoid*) or ((self?organi?* or "self organi?*") adj2 tissue)).ti,ab,kw