Schonwetter, D. J., Dion, P. R., Ready, A. E., Dyck, D. G., & al., et. (1991). The interactive effects of Type A behavior and hostility on bleeding time thromboxane and prostacyclin formation. Journal of Psychosomatic Research, 35(6), 645–650. http://www.elsevier.com/inca/publications/store/5/2/5/4/7/4/