0. Overview
1. DOCTOR selects body segment.
2. DOCTOR selects type of tests needed.
3. DOCTOR reviews selected tests.
1. DOCTOR may mark a test as "Urgent".
2. DOCTOR may demand a test result to be printed, thus mark it as "Print Needed".
3. DOCTOR may write down more notes / instructions for a test.
4. DOCTOR places test order.
5. DOCTOR receives notification when result is ready.
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6. DOCTOR interprets test results.
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