简介：These guidelines are based upon the best information available at the time of publication.They are designed to provide information and assist decision making. They are not intended to define a standard of care, and should not be construed as doing so. Neither should they be interpreted as prescribing an exclusive course of management.Variations in practice will inevitably and appropriately occur when clinicians take into account the needs of individual patients, available resources, and limitations unique to an institution or type of practice. Every healthcare professional making use
of these guidelines is responsible for evaluating the appropriateness of applying them in the setting of any particular clinical situation. The recommendations for research contained within this document are general and not meant to imply a specific protocol.