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Legends of system states involved in this case.
| System State | Abbreviation |
|---|---|
| A patient with one organ system affected (O6) | S1 |
| A patient with two organ systems affected (O6 and O8) | S2 |
| A patient with three organ systems affected (O6 and O8 and O9) | S3 |
| A patient with four organ systems affected (O6 and O8 and O9 and O10) | S4 |
| A patient with a systemic disease | S5 |
| A dead patient | S6 |
