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"What doesn't kill us is making us stronger," the Roseanne theme song used to declare. That's way too glib. And yet, Dr Paul D'Alton, who works with cancer patients St Vincent's University Hospital, Dublin, has observed that some people are able to find or develop the tools - physical, emotional, social and spiritual - to overcome experiences that would crush many of us. The fashionable term for that strength is resilience. So, is that something that can be taught, given that we all experience trauma at various times in our lives: bereavement, illness, accidents, break-ups, addiction, financial ruin or crime. In this series, Dr D'Alton hears from four exceptionally resilient people about how they have found the strength to flourish after trauma.