09/02/2004 11:00PM

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Apprentice jockey Christian Olmo was taken by helicopter to the University of Maryland Hospital after being involved in a spill during the running of the seventh race at Timonium on Friday. Two other jockeys, Richard Monterrey and Travis Dunkelberger, were unseated in the incident, which involved three horses, none of whom was injured. . . . Jockey Ramsey Zimmerman won four races on Thursday at Hoosier Park in Indiana. Two came aboard Ralph Martinez-trained horses. . . . Cot Campbell of Dogwood Stable will serve as chairman of the The Thoroughbred Owners and Breeders Association's sales integrity task force. The group will next convene on Oct. 19.