Corless D, Gupta S P, Switala S, Barragry J M, Boucher B J, Cohen R D, Diffey B L
Lancet. 1978 Sep 23;2(8091):649-51. doi: 10.1016/s0140-6736(78)92760-5.
The response of plasma-25-hydroxyvitamin D (25[OH]D) to different exposures to ultraviolet irradiation has been studied in patients in long-stay geriatric wards. Increases sufficient to bring the plasma-25(OH)D into the normal range may be obtained with doses less than those required to produce erythema. The provision of such background irradiation may be a suitable method of preventing vitamin-D deficiency in elderly subjects who receive very little exposure to sunlight.
在长期住院的老年病房患者中，研究了血浆25-羟基维生素D（25[OH]D）对不同紫外线照射量的反应。使用低于产生红斑所需的剂量，就可能使血浆25(OH)D升高至正常范围。对于很少暴露在阳光下的老年人，提供这种背景辐射可能是预防维生素D缺乏的一种合适方法。
