Table 1. Keywords/strategy used and the number of identified papers.

Search strategy	Database used	Number of papers identified
“Autism spectrum disorder [all]” AND “comorbid social anxiety [all]”	PubMed (advanced field search)	725
("Autism spectrum disorder/complications"[Mesh]) AND (( "phobia, social/complications"[Mesh] OR "phobia, social/etiology"[Mesh] ))	PubMed (MeSH) database	4
"Autism spectrum disorder" and causes of "social anxiety"	Science Direct	1,312
Total number of research papers identified		2,041
Number of articles after removing duplicates		2,037