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Between 1992 and 2003, samples of four species of gadid fish from the northern North Sea, the Faroe Islands and northern Norway were examined for myxosporean gall bladder parasites. Total numbers of each host species examined were: 665 cod Gadus morhua L., 621 haddock Melanogrammus aeglefinus (L.), 389 saithe Pollachius virens (L.) and 445 whiting Merlangius merlangus (L.). Nine species of myxosporeans...
Background: Because physical activity may affect hormonal concentrations and energy balance, we decided to investigate whether everyday exercise is related to the risk of breast cancer. Methods: During 1974-1978 and 1977-1983, a total of 25 624 women, 20-54 years of age at entry, enrolled in health surveys and answered questionnaires about leisure-time and work activity. Results: During a median...
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