Please note that Discogs is not that reliable when it comes to the different Stephen Singers, see e.g. - [https://musicbrainz.org/artist/dbfe0ea2-d56f-4a36-a25e-6fbde2f891b9|Stephen M. Singer]: IPI code: 00201357709 (active: 2000s) - [https://musicbrainz.org/artist/3d34e654-1e87-4cbb-bff1-2ad6a004e2ff|Stephen R. Singer]: IPI code: 00202304928 (active: 80s & 90s) - [https://musicbrainz.org/artist/154ede86-a8b9-4e27-8749-a33474a2bed5|Stephen L. Singer]: IPI code: 00068657923 (active: mid-90s)