Fig. 1From: Salivary Porphyromonas gingivalis predicts outcome in oral squamous cell carcinomas: a cohort studyExpressions of Porphyromonas gingivalis in oral squamous cell carcinoma (OSCC) (a), normal tissue adjacent to OSCC (b), and probe-free as negative control (d) by in situ hybridization; Gram staining (c)Back to article page