Absence of virus in renal biopsy specimens of patients.
D000650:Amnion / Q000166:cytology; D001706:Biopsy; D046508:Culture Techniques; D006801:Humans; D007668:Kidney / Q000382:microbiology*; D007674:Kidney Diseases / Q000209:etiology / Q000382:microbiology*; D014780:Viruses / Q000302:isolation & purification*