＊4 Heo JY, et al. Effects of smartphone use with and without blue light at night in healthy adults: A randomized, double-blind, cross-over, placebo-controlled comparison. J Psychiatr Res. Apr 2017;87:61-70.
＊5 Stevens, R.G.，and Brainard, G.C.，et al,: Breast cancer and circadian disruption from electric lighting in the modern world，CA Cancer J Clin. May-Jun 2014;64(3):207-218.
＊6 Turner, P.L. , Mainster, M.A.：Circadian photoreception: ageing and the eye's important role in systemic health, Br J Ophthalmol, Nov 2008; 92(11):1439-1444.