The promoters of a planned series of Michael Jackson comeback concerts said Thursday a lawsuit holding them responsible for the singer's death was “inaccurate, unsubstantiated and meritless.” In its first comment on a wrongful death lawsuit filed Wednesday by Jackson's mother, Katherine, and his children, AEG Live denied it had hired the singer's personal physician. Katherine Jackson's lawsuit revived early controversies around the strain of the concerts on Jackson after years away from the stage. It claimed Jackson appeared drugged and disoriented at rehearsals in the days before his death, and that he was shivering badly on June 24. AEG, it claimed, was aware of his condition but did not postpone any rehearsals or alter his “grueling schedule.”