Recommended summer sunlight exposure levels can produce sufficient (> or =20 ng ml(-1)) but not the proposed optimal (> or =32 ng ml(-1)) 25(OH)D levels at UK latitudes.
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A. Webb | L. Rhodes | J. Berry | A. Vail | R. Kift | M. Durkin | Heather I Fraser | D. Allan | S. J. O’Brien | Sarah J. O'Brien