Drobot had been the executive director of Healthcare Medical Center from 1980 to 1984 .
Drobot 's Concept Health Group , Inc. acquired Healthcare Medical Center of Tustin in July 1990 .
Drobot had been the Drobot   of Healthcare Medical Center from 1980 to 1984 .
Drobot 's Concept Health Group , Inc. acquired Healthcare Medical Center of Tustin in July 1990 .