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In total, 242 subjects (224 female, 16 male) participated in the study (mean age 67.6 years). During one week, the magnetic field levels were measured as close as possible to the subject's head during sleep. Urine was collected by the subjects on two days (approximately 3 days apart) for somewhat longer than 24 hours.
Davis S et al.
Effects of 60-Hz magnetic field exposure on nocturnal 6-sulfatoxymelatonin, estrogens, luteinizing hormone, and follicle-stimulating hormone in healthy reproductive-age women: results of a crossover trial.
Kurokawa Y et al.
Acute exposure to 50 Hz magnetic fields with harmonics and transient components: Lack of effects on nighttime hormonal secretion in men.
Touitou Y et al.
Magnetic fields and the melatonin hypothesis: a study of workers chronically exposed to 50-Hz magnetic fields.
Bakos J et al.
One week of exposure to 50 Hz, vertical magnetic field does not reduce urinary 6-sulphatoxymelatonin excretion of male wistar rats.