Masters, Barry R. (2012-05-25). Longo, Dan L.; Fauci, Anthony S.; Kasper, Dennis L.; Hauser, Stephen L.; Jameson, J. Larry; Loscalzo, Joseph (eds.). Harrison's Principles of Internal Medicine (18th ed.). McGraw Hill. pp. 1407–1408. doi:10.1007/s00417-012-1940-9. ISBN9780071748896. ISSN0721-832X.
Masters, Barry R. (2012-05-25). Longo, Dan L.; Fauci, Anthony S.; Kasper, Dennis L.; Hauser, Stephen L.; Jameson, J. Larry; Loscalzo, Joseph (eds.). Harrison's Principles of Internal Medicine (18th ed.). McGraw Hill. pp. 1407–1408. doi:10.1007/s00417-012-1940-9. ISBN9780071748896. ISSN0721-832X.