BROOKLINE — A best-selling author and medical director of a renowned trauma center in Massachusetts has been fired from his job amid accusations of employee mistreatment.The Boston Globe reports Dr. Bessel van der Kolk was removed from his position at the Brookline Trauma Center in January, which he founded 35 years ago.Andy Pond, president of the nonprofit organization Justice Resource Institute, says van der Kolk created a hostile work environment and made employees feel denigrated and uncomfortable.