That site is interesting in terms of what is included and what is not
included. When I noted “studies” by the Geiers (not a credible source), I wasn’t surprised to then see links to “selected articles” by Jenny McCarthy, Age of Autism, and David Kirby (also not credible sources). :/
You might do better in terms of completeness and avoiding bias/agenda by just searching on PubMed by category. And since you are a physician you may have access to some of the journals and full texts that most of us find behind pay walls.
I noticed this -- the full text of a review you might be interested in that was published last month – has over 100 study citations you might find useful in some categories:Environmental risk factors for autism: an evidence-based review of systematic reviews and meta-analyseshttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC5356236/
You also may be interested in the upcoming IMFAR (International Meeting for Autism Research) next month. Hundreds of studies will be presented, though the abstracts are embargoed until the conference begins. You can view the schedule here for an idea of the many topics:http://www.autism-insar.org/page/Schedule/
Once the meeting begins, the abstracts will be available in a searchable database. You can also download the abstract book, but be forewarned, it is a HUGE file.
The archives of the past meetings (back to 2004) are also available – also with searchable databases for abstracts (click on year):http://www.autism-insar.org/page/IMFARarchives
A. lot. of. stuff. ! :)