Cohen LM, Britt DM, Collins FL, Al'Absi M, McChargue DE. Multimodal assessment of the effect of chewing gum on nicotine withdrawal. Addict Behav. 2001 Mar 1;26(2):289-95.
Carlson AM, Stockwell-Morris L, Perfetto EM, Appel AM, Gilsenan AW. Quality of sleep in patients with osteoarthritis treated with extended-release and conventional etodolac. J Am Pharm Assoc. 1998 Jan;38(1):31-6. doi: 10.1016/S1086-5802(16)30297-2
Cohen LM, Collins FL, Britt DM. The effect of chewing gum on tobacco withdrawal. Addict Behav. 1997 Nov 1;22(6):769-73.