Becker N, Fortuny J, Alvaro T, Nieters A, Maynadie M, Foretova L, Staines A, Brennan P, Boffetta P, Cocco PL, de Sanjose S. Medical history and risk of lymphoma: results of a European case-control study (EPILYMPH). J Cancer Res Clin Oncol. 2009 Aug;135(8):1099-107. doi: 10.1007/s00432-009-0551
Britt DM, Cohen LM, Collins FL, Cohen ML. Cigarette smoking and chewing gum: response to a laboratory-induced stressor. Health Psychol. 2001 Sep 1;20(5):361-8.