When it comes to healthcare systems these are very heavily Windows
based and to be able to integrate with other systems everyone has to
be using compatible software. Suspect that this is an area where Linux
will find it very difficult, if not impossible, to gain a foothold. It
would take a major healthcare software provider to decide to support
both Windows and Linux in parallel - lot of work for not much benefit
on their side as they already have a captive market based on Windows.