I haven't
As an IT contractor with medical customers I have access to their practice management systems at an administrative level. I could access every record without leaving a trace.
I have never taken so much as a sneaky peak at anything other than the test patients (which are quite intentionally filled with humorous medical conditions). To do so is a gross breach of trust and I would be sickened to discover that anyone other than an authorised doctor had read my medical record. That is the most personal data that can be held about a person.