Afterwards, however higher latitudes experienced a decreasing trend of incidence for a short period after 1965–70 [ 120 , 122 ], increasing incidence and prevalence was reported from Scotland, United Kingdom and Netherlands.
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Geomagnetic disturbances may be environmental risk factor for multiple sclerosis: an ecological study of 111 locations in 24 countries.
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The sentences
Since 1937 solar maximums started an increasing trend, reached to mean yearly sunspot number of 151 in 1947 and then registered a record in 1957.