Schmitt CL, Allen JA, Kosa KM, Curry LE. Support for a ban on tobacco powerwalls and other point-of-sale displays: findings from focus groups. Health Educ Res. 2015 Feb;30(1):98-106. doi: 10.1093/her/cyu046.
Nicholls TJ, Cook DJ, Rogers DJ, Wolowacz SE, Smart JD. An investigation of lectin toxicity with cultured human conjunctival epithelial cells; lectins: biology biochemistry. Clin Chem. 1996;11:273-6.