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Cortex and medullar tissue data (see text for description of various groups)
| Crystal deposits | Group 1 n = 6 | Group 2 n = 6 | Group 3 n = 6 | Group 4 n = 6 | Group 5 n = 6 |
| None | 6 | 5 | 5 | - | - |
| Crystals: + | - | 1 | 1 | 2 | - |
| Crystals ++ | - | - | - | 4 | - |
| Crystals +++ | - | - | - | - | 6 |
