The Heritability of Macular Response to Supplemental Lutein and Zeaxanthin: a Classical Twin Study. Hammond CJ, Liew SM, Van Kuijk FJ, Beatty S, Nolan JM, Spector TD, Gilbert C. Investigative Ophthalmology and Visual Science. July 2012.

The Heritability of Macular Response to Supplemental Lutein and Zeaxanthin: a Classical Twin Study. Hammond CJ, Liew SM, Van Kuijk FJ, Beatty S, Nolan JM, Spector TD, Gilbert C. Investigative Ophthalmology and Visual Science. July 2012.