| X39 | Exposure to other forces of nature |
| | Exposure to natural radiation |
| | Exposure to radon |
| | …… initial encounter, initial encounter |
| | …… initial encounter, initial encounter, subsequent encounter |
| | …… initial encounter, initial encounter, sequela |
| | Exposure to other natural radiation |
| | …… initial encounter, initial encounter |
| | …… initial encounter, initial encounter, subsequent encounter |
| | …… initial encounter, initial encounter, sequela |
| | Other exposure to forces of nature |
| | …… initial encounter, initial encounter |
| | …… initial encounter, initial encounter, subsequent encounter |
| | …… initial encounter, initial encounter, sequela |
