The article Collecting and Measuring Nociceptive and Inflammatory Mediators in Surgical Wounds, has been retracted at the request of the authors due to duplication of text in J Pain (Carvalho B, Clark DJ, Angst MS (2008) Local and Systemic Release of Cytokines, Nerve Growth Factor, Prostaglandin E2, and Substance P in Incisional Wounds and Serum Following Cesarean Delivery. J Pain 9: 650-657.) due to an honest mistake of the authors.