==References==
===Necessity===
It is acceptable to write from experience if editing under one's real name rather than a username, although material should preferably still be supported by reliable external sources whenever it is likely that such exists for the topic of a sentence or section. Such external sources should, where available, be secondary ones such as textbooks and reviews rather than primary studies.
When editing under one's real name, it is also acceptable to use a hospital as a reference for local practices, as for example in [[X-ray of knee prosthesis#Reporting]].
==Geographic origin==