Williams RE, Bosnic N, Sweeney CT, Duncan AW, Levine KB, Brogan M, Cook SF. Prevalence of opioid dispensings and concurrent gastrointestinal medications in Quebec. Pain Res Manag. 2008;13(5):395-400.
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.