Genta ( GNTA) said Dr. Jerome Groopman quit its board, citing personal health reasons.

Groopman, who also writes for the New Yorker magazine , had served on the board since 2002.

"The board has very reluctantly accepted Jerry's resignation effective as of today," said CEO Raymond P. Warrell. "Over the past few years, his advice and counsel have been an incredible asset to his colleagues on our board, and we are all deeply grateful for his years of service. We understand this decision and wish him well during his recovery."