Medicine is an ever-changing science. As new research and clinical experience broaden our knowledge, changes in treatment and drug therapy are required. McGraw Hill and the McGraw Hill designated online providers have checked with sources believed to be reliable in their efforts to provide information that is complete and generally in accord with the standards accepted at the time of publication. However, in view of the possibility of human error or changes in medical sciences, neither McGraw Hill nor the McGraw Hill designated online providers warrants that the information contained in the McGraw Hill Medical online products (McGraw Hill Medical’s online products include "AccessAnesthesiology", "AccessBioMedical Science", AccessCardiology", "AccessDermatologyDxRx", ""AccessEmergency Medicine", "AccessHemOnc", "AccessMedicina", "AccessMedicine", "AccessNeurology", "AccessObGyn", "AccessPediatrics," "AccessPharmacy", "AccessPhysiotherapy", "AccessSurgery", "Case Files Collection", "Clinical Sports Medicine Collection", "Murtagh Collection", "OMMBID". "Pharmacotherapy Principles and Practice" and “MHMedical” web pages) is in every respect accurate or complete, and they are not responsible for any errors or omissions or the results obtained from the use of such information. Users are encouraged to confirm the information contained in McGraw Hill Medical products with other sources. For example, and in particular, users are advised to check the product information sheet included in the package of each drug they plan to administer to be certain that the information contained in McGraw Hill Medical’s online products is accurate and that changes have not been made in the recommended dose or in the contraindications for administration. This recommendation is particularly important in connection with new or infrequently used drugs. Neither McGraw Hill nor the McGraw Hill designated online providers shall be liable to the user or to anyone else for any inaccuracy, delay, interruption in service, error or omission, regardless of cause, or for any damages resulting therefrom.