Launched in 1996, www.eMedicine.com comprises the largest and most current Clinical Knowledge Base available to physicians and other healthcare professionals. eMedicine's subscription site for institutions is www.iMedicine.com. Nearly 10,000 physician authors and editors contribute to the eMedicine Clinical Knowledge Base, which contains articles on 7,000 diseases and disorders. The evidence-based content, updated regularly, provides the latest practice guidelines in 59 medical specialties. eMedicine's professional content undergoes 4 levels of physician peer review plus an additional review by a PharmD prior to publication.