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Table 2 Cortex and medullar tissue data (see text for description of various groups)

From: Lemon juice has protective activity in a rat urolithiasis model

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