So it seems that I had to put a request anyway, which I just did. Hopefully, I can get the access soon. Thanks.
Thanks for the information. I just submitted my request and look forward to hearing from your review. :)
Do I need to request access to download SHHS2 as well? It's mentioned in the PhysioNet webpage that "Following a 2003 agreement between SHHS and PhysioNet to make 1000 polysomnograms from the SHHS-2 examination available freely via PhysioBank, in 2014 the SHHS investigators launched the National Sleep Research Resource (NSRR), which offers free access to much more of the SHHS PSG Database". There's only a sample record available to download. I just need 100-200 records or even less than 100 from the SHHS-2 would work for my research. I was wondering where I can download them for free and if I still need to request access and provide an IRB review for that.