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All health and health-related information contained within this Johns Hopkins Medicine Web site is intended to be general in nature and should not be used as a substitute for a visit with a health care professional. The content is intended to offer only a general basis for individuals to discuss their medical condition with their health care provider. Your health care provider should be consulted regarding matters concerning the medical condition, treatment and needs of you and your family.

Please note that some pages within this Web site, for the convenience of users, are linked to Web sites not managed by Johns Hopkins Medicine. Neither The Johns Hopkins University nor The Johns Hopkins Health System review, control or take responsibility for the content of these Web sites. They are provided as a source of additional information only.

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Although every effort is made to ensure that the material within this Johns Hopkins Medicine Web site is accurate and timely, it is provided for the convenience of the Web site user and should not be considered official. Users of this Web site are advised to refer to and rely upon the official version of information when making significant decisions, including decisions related to employment opportunities at Johns Hopkins.

The medical information contained in this site is approved by Johns Hopkins professionals. Condition information has been provided by our publishing partner, University Health Publishing, from their book "Johns Hopkins Symptoms and Remedies: The Complete Home Medical Reference."