1. Opposer: Patient-controlled epidural analgesia is the technique of choice for epidural analgesia in labor;Aveling;Int J Obstet Anesth,2005
2. The doctors’ plague: germs, childbed fever, and the strange story of Ignac Semmelweis;Nuland,2003
3. Personal communications. Dr. Edward H. Thompson, Department of Economic Studies, Dundee University, Scotland. July 3 and July 5, 2004.
4. Simpson, Semmelweis and transformational change;Grant;Obstet Gynecol,2005
5. Hand washing and hand disinfection: more than your mother taught you;Katz;Anesthesiol Clin North Am,2004