Binkley N, Novotny R, Krueger D, et al. Low vitamin D status despite abundant sun exposure. J Clin Endocrinol Metab. 2007 Jun; 92 (6): 2130–35.
393
Pramyothin P, Techasurungkul S, Lin J, et al. Vitamin D status and falls, frailty, and fractures among postmenopausal Japanese women living in Hawaii. Osteoporos Int. 2009 Nov; 20 (11): 1955–62.