Coon CD, McLeod LD. Patient-reported outcomes: current perspectives and future directions. Clin Ther. 2013 Apr 1;35(4):399-401.
Ciociola AA, Koch KM, McSorley DJ. Safety and pharmacokinetics of chronic oral dosing of gr122311x (ranitidine bismuth citrate), a new bismuth compound with anti-secretory activity. Gastroenterology. 1992;102(4):A50.