Machine learning reveals microbiome differences by periodontitis severity - Soo Hyun Seo; Jae Won Lee; Sujin Oh; Jin-Sil Hong; Ban Seok Lee; Sun Jae Kwon; Keun-Suh Kim; Jung Soo Park; Ju Sun Heo; Ki Hoon Ahn; Hyo‐Jung Lee; Kyoung Un Park (PLoS ONE, 2026)