Psychoneuroimmunology Link between stress and disease
 Stressors can produce profound health consequences. Kaprio J. Koskenvuo M. and Rita H. 1987. Theorists propose that stressful events trigger cognitive and affective responses which, in turn, induce sympathetic nervous system and endocrine changes. These ultimately impair immune function. Chrousos G.P. and Gold P.W. 1992. The concepts of stress and stress system disorders.