![Absence of Seasonal Variation in Serum Concentrations of 1,25-Dihydroxyvitamin D Despite a Rise in 25-Hydroxyvitamin D in Summer*]()
Absence of Seasonal Variation in Serum Concentrations of 1,25-Dihydroxyvitamin D Despite a Rise in 25-Hydroxyvitamin D in Summer*CHESNEY, RUSSELL W.; ROSEN, JOHN F.; HAMSTRA, ALAN J.; SMITH, CONNIE; MAHAFFEY, KATHRYN; DELUCA, HECTOR F. · The Journal of Clinical Endocrinology & Metabolism · 1981