Original sentence: Krigsman left Lenox Hill in December 2004, after being disciplined for performing medically unnecessary procedures on autistic children without informed consent and without approval by the hospital..  His research was also subjected to review by the Department of Health and Human Services Office for Human Research Protections
Edited sentence: His research was also subjected to review by the Department of Health and Human Services Office for Human Research Protections.Krigsman resigned from Lenox Hill in December 2004, after a lawsuit following official investigations