University professor, 37, dies from lung cancer after string of doctors dismissed symptoms as 'anxiety and depression'

[John_Mills]

Lisa Smirl, 37, saw three doctors with a range of symptoms over a year

Had been suffering from shortness of breath, weight loss and arm pain

Despite this, doctors dismissed her symptoms as psychological

By the time cancer was diagnosed it had spread throughout her body

Cambridge-educated lecturer died last month, a year after being diagnosed

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