The Association between Serotonin Transporter Polymorphism, Platelet Serotonin Concentration and Insomnia in Non-Depressed Veterans with Posttraumatic Stress Disorder. - Kovacic Petrovic Z; Nedic Erjavec G; Nikolac Perkovic M; Svob Strac D; Peraica T; Tudor L; Pivac N (Psychiatria Danubina, 2019)