Joseph Phillips, PMP, CompTIA Project+, CompTIA CTT+, a leading project management consultant and educator, has been a PMP and a CompTIA Certified Technical trainer for more than 12 years. He is the director of education for Project Seminars, Inc., and the bestselling author of several books, including PMP Project Management Professional Study Guide, Fourth Edition and CompTIA CTT+ Certified Technical Trainer All-in-One Exam Guide.Editor Admir Hadzic, MD, PhD Professor of Anesthesiology Department of Anesthesiology St. Luke's-Roosevelt Hospital Center College of Physicians & Surgeons Columbia University New York, New York Associate Editors Ana Carrera, PhD, MD Thomas B. Clark, DC, RVT Jeff… Gadsden, MD, FRCPC, FANZCA Manoj Kumar Karmakar, MD, FRCA, FHKCA, FHKAM Xavier Sala-Blanch, MD Catherine F.M. Vandepitte, MD Daquan Xu, MD, MSc, MPH