Table 1.

Details of two search queries used in constructing our document collection.

Search Topic	Schizophrenia	Substance-related Disorder
Search string	(“functional neuroimaging”[mh]) (“schizophrenia”[mh]) NOT (meta-analysis[pt] OR review[pt]) NOT (meta-analysis[ti] or review[ti])	(“functional neuroimaging”[mh]) (“substance-related disorders”[mh]) NOT (meta-analysis[pt] or review[pt]) NOT (meta-analysis[ti] or review[ti])
PMC filters	Free full text; Time In the last 5 years; Subjects: Humans; language: English	Free full text; Time In the last 5 years; Subjects: Humans; language: English
# of returned articles	335	200
# of returned articles in BioC	196	162
# of articles in document collection	196 + 162 – 2 = 356 (two articles are shared between the above two sets)