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B12 deficiency in vegetarian and non-vegetarian women.
data(B12Diet)
A data frame with 124 rows (one for each person) and 2 columns:
B12 deficiency; one of 1 (B12 deficient) or 2 (Not B12 deficient)
1
2
The diet; one of 1 (Vegetarian) or 2 (non-vegetarian)