Seasonal and age-related differences in serum 25-hydroxyvitamin D, 1,25-dihydroxyvitamin D and parathyroid hormone in patients from Western Norway

Cyclic Changes of Vitamin D and PTH are Primarily Regulated by Solar Radiation: 5-Year Analysis of a German (50° N) Population

(2009) J. Reusch et al.   HORMONE AND METABOLIC RESEARCH

Estimation of the dietary requirement for vitamin D in healthy adults

(2008) Kevin D Cashman et al.   AMERICAN JOURNAL OF CLINICAL NUTRITION

Vitamin D status in postmenopausal women living at higher latitudes in the UK in relation to bone health, overweight, sunlight exposure and dietary vitamin D

(2008) Helen M. Macdonald et al.   BONE

The “Sunshine Deficit” and Cardiovascular Disease

(2008) Diane E. Wallis et al.   CIRCULATION

Vitamin D Metabolites and Calcium Absorption in Severe Vitamin D Deficiency

(2008) Allan G Need et al.   JOURNAL OF BONE AND MINERAL RESEARCH

A longitudinal study of serum 25-hydroxyvitamin D and intact parathyroid hormone levels indicate the importance of vitamin D and calcium homeostasis regulation in multiple sclerosis

(2007) M Soilu-Hanninen et al.   JOURNAL OF NEUROLOGY NEUROSURGERY AND PSYCHIATRY