TY - JOUR AU - Ballieux, R E TI - Impact of mental stress on the immune response JO - J Clin Periodontol IS - 06 VL - 18 PY - 1991 DO - 10.1111/j.1600-051X.1991.tb02311.x L3 - PubMed-ID: 1890223 SP - 427 EP - 430 ER -