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- [3] GEOGRAPHICAL-DISTRIBUTION OF MULTIPLE-SCLEROSIS MORTALITY IN SPAIN ACTA NEUROLOGICA SCANDINAVICA, 1987, 76 (04): : 306 - 309
- [4] SIMILAR GEOGRAPHICAL DISTRIBUTION OF MULTIPLE-SCLEROSIS AND CANCER OF COLON ACTA NEUROLOGICA SCANDINAVICA, 1975, 52 (04): : 294 - 302