Obana, Akira
Gohto, Yuko
Nakazawa, Risa
Moriyama, Takanobu
Gellermann, Werner
Bernstein, Paul S.
Article History
Received: 19 January 2020
Accepted: 27 May 2020
First Online: 24 June 2020
Competing interests
: Gellermann W. is with Longevity Link Corporation and holds multiple patents on the use of reflection spectroscopy for the measurement of carotenoids in the skin, eye, and other tissues. Bernstein PS consults for Heidelberg Engineering Inc. Obana A., Gohto Y., Nakazawa R. and Moriyama T declare no competing Interests.