{{sfn|Bope|Kellerman|2011|p=}}

* {{cite book | last=Bope | first=Edward T. | last2=Kellerman | first2=Rick D. | title=Conn's Current Therapy 2012 | publisher=Elsevier Health Sciences | date=2011-12-09 | isbn=978-1-4557-3305-7}}

<ref name="f247">{{cite book | last=Bope | first=Edward T. | last2=Kellerman | first2=Rick D. | title=Conn's Current Therapy 2012 | publisher=Elsevier Health Sciences | date=2011-12-09 | isbn=978-1-4557-3305-7 | page=}}</ref>