title: First results of an electron microscopic study of the yaws papilloma.
mesh_terms: D006801:Humans; D008854:Microscopy, Electron; D010212:Papilloma / Q000382:microbiology / Q000473:pathology; D014208:Treponema / Q000302:isolation & purification; D015001:Yaws / Q000382:microbiology / Q000473:pathology*