"Why didn't you say what was involved? Having to sign a consent form means there must be risks!" he fumed.

他火冒三丈，“为什么你不说清怎么回事？要签同意书就说明一定有风险！”

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Before the pill is handed out the woman is asked to sign a consent form.

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He has pointed out that ACT's patients sign a consent form in which they are told about the risk of an allergic reaction.

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And, prior to the trip, parents should be given full details and must sign a consent form before their child can take part.

BBC: NEWS | UK | Education | School trips in the spotlight