"I think people with a mental illness have to work harder to be good parents, " she added.

BBC: Psychiatric wards 'neglect' duty to parents

Of all the questions sent to me for CNNhealth, I wanted to address yours first, because it breaks my heart, because it points to the devastation that mental illness can cause, and because I've seen similar situations a thousand times in my work as a psychiatrist.

CNN: How can I help my despairing son?

"By building understanding I think we can get away from the idea that mental illness in young people is primarily a moral problem or a random disaster and try and move understanding more toward a rational direction, " said Prof Bullmore.

BBC: Brain scan study to understand workings of teenage mind

"I think we need to see what comes out with more data before we rush to judgment about whether he has a mental illness or something else that's different than that, " he said Tuesday on CNN.

CNN: STORY HIGHLIGHTS