Article Title,Year,Volume,Issue,Page Range,Author Effect of inhalation of ozone on healthy people,1987,57,4,454,Ritzel Seasonal changes in vitamin D status and bone turnover in healthy Irish postmenopausal women,2007,77,5,320-325,Jakobsen Connection between dark adaptation and vitamin A and carotene concentration in the blood,1976,46,1,100-104,Rankov Vitamin A and carotene concentration in serum in persons with chronic conjunctivitis and pterygium,1976,46,4,454-457,Rankov