Measurements and Instruments include: 1) Self-report questionnaires, such as:Profile of Mood States (POMS-SF),Coping Inventory (COPE), Life Orientation Test Revised (LOT- R),Stress Level Report, 2) Demographics, 3) Global assessment by the head nurse. 4)Physiological and behavioral measures, such as: vital signs and use of medicine. 5)Hormonal and immunological measures: levels of cortisol in saliva and plasma, levels of catecholamines in plasma, salivary levels of IgA1, and peripheral blood NK cells and lymphocyte phenotyping.6)levels of cytokines including IL-1,2,4,6,10,12, TNF-alpha, Interferon-gamma.