The efficacy and safety of levetiracetam in the prophylaxis of migraine headaches in children – a randomised trial - Ghazavi, Mohammadreza; Jelodar, Gholamreza; Yaghini, Omid; Nasiri, Jafar; Sadeghian, Saeid; Malamiri, Reza Azizi (Pediatria Polska - Polish Journal of Paediatrics, 2019)