There are fears public health doctors are losing their ability to speak freely.
They're being told they need permission before speaking out on regional issues which could impact public health.
Health Minister Simeon Brown says he's fed up with them giving advice on things like fast-food.
Association of Salaried Medical Specialists Executive Director Sarah Dalton told Francesca Rudkin Brown is overstepping.
She says there are widespread concerns of attempts to silence doctors – to stop them speaking up on public health and patient safety issues.
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