The American College of Emergency Physicians (ACEP) makes every effort to ensure that contributors and editors of its publication are knowledgeable subject matter experts and that they used their best efforts to ensure accuracy of the content. However, it is the responsibility of each reader to personally evaluate the content and judge its suitability for use in his or her medical practice in the care of a particular patient. Readers are advised that the statements and opinions expressed in this publication are provided as recommendations of the contributors and editors at the time of publication and should not be construed as official College policy. ACEP acknowledges that, as new medical knowledge emerges, best practice recommendations can change faster than published content can be updated. ACEP recognizes the complexity of emergency medicine and makes no representation that this publication serves as an authoritative resource for the prevention, diagnosis, treatment, or intervention for any medical condition, nor should it be used as the basis for the definition of or the standard of care that should be practiced by all health care providers at any particular time or place. To the fullest extent permitted by law, and without limitation, ACEP expressly disclaims all liability for errors or omissions contained within this publication, and for damages of any kind or nature, arising out of use, reference to, reliance on, or performance of such information.