In the original publication, reference number 20 was incorrect. It was printed as “Aldwin CM, Levenson MR, Spiro A 3rd. Vulnerability and resilience to combat exposure: can stress have lifelong effects? Psychol Aging 1994;9:34-44.” It should be revised as follows: “Aldwin CM. Stress, Coping, and Development: An Integrative Perspective. New York: Guilford Press; 1994.”