31. Petrie KJ, Booth R, Pennebaker JW, Davison KP, Thomas M. Disclosure of trauma and immune response to hepatitis B vaccination program. J Consult Clin Psychol. 1995;63:787-792.

32. Smyth JM, Pennebaker JW. Sharing one's story: translating emotional experiences into words as a coping tool. In: Snyder CR, ed. Coping: The Psychology of What Works. New York, NY: Oxford University Press Inc. In press.

33. Engel GL. The need for a new medical model: a challenge for biomedicine. Science. 1977;196:129-136.

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