He is working as professor in University of Leiden. He is the Editorial Board Member of many peer reviewed journals and his area of expertise, as an Research Scholar credits him with many publications in national and international journals. He is committed to highest standards of excellence and it proves through his co-authorship of many books.

Neurosciences, Neurology, Clinical Neuroscience, Behavioral, Neuroscience, Cognitive Neuroscience, Cellular Neuroscience, Molecular Neuroscience, Neurological Disorders, Physiology of Sleep & Wakefulness, Circadian Rhythm Sleep Disorder, Aging and Sleep, Delayed Sleep, Hypopnea Syndrome, Sleep Deprivation, Insomnia, Sleep Medicine, Behavioral Sleep, Sleep Apnea, Epilepsy, Hypersomnia, Delirium, Dementia, Obsessive-compulsive disorder, Schizoaffective disorder,Neurological Disorders