A hearing is due to get under way into a hospital doctor who was suspended from his post in Leicester after misdiagnosing children with epilepsy.
All the children affected were treated at the LRI
Dr Andrew Holton was suspended after he prescribed the wrong treatment to hundreds of patients in the late 1990s.
The General Medical Council launched an inquiry more than three years ago. Its hearing into the case begins on Monday.
Parents' groups had hit out at the long wait for the hearing.
Dr Holton was working as consultant neurologist at the Leicester Royal Infirmary in 2000 when he was investigated for misdiagnosing more than 600 children as epileptic and prescribed potentially damaging medication.
A report by an independent NHS inquiry team in 2003 found complaints were first made about Dr Holton, who worked at the Leicester Royal Infirmary, almost three years before he was suspended.
Dr Holton was suspended on full pay in May 2001, but later left the University Hospitals of Leicester NHS Trust.