title: Light and electron microscopical studies of rectal biopsies in cystic fibrosis.
mesh_terms: D001706:Biopsy; D002648:Child; D002675:Child, Preschool; D003550:Cystic Fibrosis / Q000175:diagnosis / Q000235:genetics / Q000473:pathology*; D004847:Epithelial Cells; D004848:Epithelium / Q000473:pathology; D006801:Humans; D008853:Microscopy; D008854:Microscopy, Electron; D012007:Rectum / Q000473:pathology*