text:  Liver_S020108-277_Sildenafil_300 mg/kg_0.25d Liver, Sildenafil, 0.25d strain: Sprague Dawley, CD-IGS; tissue: Liver; compound: Sildenafil; dose: 300 mg/kg; time: 0.25 d; vehicle: Saline; route: Oral Gavage; Sex: Male; rna extraction date: 2002-01-16; hybridization date: 2002-01-18