O Dressman: Oral Drug Absorption: Prediction and Assessment, Marcel Dekker, 2000. Obstetrics / Gynecology, eMedicine, 2002. Obstetrics - Normal and Problem Pregnancies, 5th ed, Churchill Livingstone, Inc., 2007. OMIM - Online Mendelian Inheritance in Man, Johns Hopkins University Press. Oncology, eMedicine, 2002. Operative Surgery Manual, Elsevier, 2003. Ophthalmology, eMedicine, 2002. Ophthalmology, 2nd ed, Mosby, Inc., 2004. Orthopedic Surgery, eMedicine, 2002. The Osler Medical Handbook, 2nd ed, Johns Hopkins University, 2006. Otolaryngology: Head and Neck Surgery, 4th ed, Mosby-Year Book, Inc., 2005. Otolaryngology and Facial Plastic Surgery, eMedicine, 2002.