Ultrastructure of cells present in lymph nodes during the development of contact sensitivity.
D000818:Animals; D006168:Guinea Pigs; D006967:Hypersensitivity; D008198:Lymph Nodes / Q000166:cytology*; D008727:Methotrexate; D008854:Microscopy, Electron; D012867:Skin
D008727:Methotrexate