Influences of chronic smoking and alcohol comsumption on oxytocin- and diltiazem-induced functional responses of pregnant rat myometrium kroni̇k si̇gara ve alkol maruzi̇yeti̇ni̇n gebe rat mi̇yometri̇yum oksi̇tosi̇n- ve di̇lti̇azem-aracili fonksi̇yonel yanitlari üzeri̇ne etki̇leri̇