Comparing the safety and efficacy of sodium valproate, levetiracetam, and phenytoin in attenuating the severity of agitation in patients with post-traumatic brain injury: An observational study - Shivani Singh; Raghavendra Nayak; Shivaprakash Gangachannaiah; Ashutosh Bhosale; Reena Sherin Parveen; Varun Kumar S G; Geeta Sundar (PLoS ONE, 2026)