The judge in the forthcoming trial of Michael Jackson's doctor Conrad Murray has barred the singer's dermatologist from giving evidence.
Dr Murray's lawyers had wanted to argue that Arnold Klein injected Jackson with the painkiller demerol "for no valid medical purpose" and that the star became addicted to the drug.
The judge said it was "not relevant".
The defence plan to portray Jackson as an addict who may have given himself a lethal dose of the drug propofol.
Dr Murray, who was hired by Jackson to help prepare for his planned July 2009 comeback concerts at London's O2 arena, was in charge of administering the anaesthetic to the star.

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