Cadigan RJ, Edwards TP, Lassiter D, Davis AM, Henderson GE. "Forward-Thinking" in U.S. biobanking. Genet Test Mol Biomark. 2017 Mar;21(3):148-54. doi: 10.1089/gtmb.2016.0393
Rothman KJ, Glass RL, Espinal F, Velez H. Caries-free teeth in the absence of fluoride ion. J Public Health Dent. 1972;32(4):225-8. doi: 10.1111/j.1752-7325.1972.tb03977.x