public function getRecommListsCount($sOx = null)
    {
        if (!$sOx) {
            $sOx = $this->getId();
        }

        if ($this->_iCntRecommLists === null || $sOx) {
            $oDb = \OxidEsales\Eshop\Core\DatabaseProvider::getDb();
            $this->_iCntRecommLists = 0;
            $iShopId = \OxidEsales\Eshop\Core\Registry::getConfig()->getShopId();
            $sSelect = 'select count(oxid) from oxrecommlists where oxuserid = ' . $oDb->quote($sOx) . ' and oxshopid ="' . $iShopId . '"';
            $this->_iCntRecommLists = $oDb->getOne($sSelect);
        }

        return $this->_iCntRecommLists;
    }