S. Johnsen

Daily supplementation with 15 μg vitamin D2 compared with vitamin D3 to increase wintertime 25-hydroxyvitamin D status in healthy South Asian and white European women: a 12-wk randomized, placebo-controlled food-fortification trial

Laura Tripkovic, L. R. Wilson, Kathryn Hart et al. · American Journal of Clinical Nutrition · 2017 · 103 citations · Full text

Nutrition, Vitamin D3, Medicine +10

A placebo controlled investigation into the effects of paroxetine and mirtazapine on measures related to car driving performance

Fran Ridout, Robert Meadows, S. Johnsen et al. · Human Psychopharmacology Clinical and Experimental · 2003 · 70 citations

Greater seasonal cycling of 25-hydroxyvitamin D is associated with increased parathyroid hormone and bone resorption

A. L. Darling, Kathryn Hart, MA Gibbs et al. · Osteoporosis International · 2013 · 41 citations · Full text

Increased Parathyroid Hormone, Physiology, Clinical Nutrition +10

Internal Cerebral Vein Thrombosis

S. Johnsen, R. Mark Greenwood, M. Fishman · Archives of Neurology · 1973 · 35 citations

Pediatric Hydrocephalus, Vascular Malformation, Cerebral Venous Thrombosis +16

Mechanisms of Inhibition of Heart Rate by Phenylephrine

S Varma, S. Johnsen, Daniel Sherman et al. · Circulation Research · 1960 · 32 citations

Cardiac Muscle, Hypertension, Heart Rate +13