There was also a recent paper about a new clustering method that mentioned this case, with plenty of caveats.

nostr:nevent1qqsgvzx5raqvsnuwtnppsjnul8cyfdalmj66chk99t2u0ej4a48g8zspr4mhxue69uhkummnw3ez6ur4vgh8wetvd3hhyer9wghxuet5qgsgdp0taan9xwxadyc79nxl8svanu895yr8eyv0ytnss8p9tru047qrqsqqqqqp47j62r