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Reverse transcription-polymerase chain reaction (RT-PCR) products visualized on 2% agarose gel stained with ethidium bromide. Lane 1, molecular weight markers VI (Boehringer Mannheim). Lanes 2–4, case no. 1; lane 2, β-actin; lane 3, IL-1β; lane 4, IL-1Ra. Lanes 5–7, case no. 6; lane 5, β-actin; lane 6, IL-1β; lane 7, IL-1Ra. Lanes 8–10, case no. 31; lane 8, β-actin; lane 9, IL-1β; lane 10, IL-1Ra.
