King Salman Humanitarian Aid and Relief Center (KSrelief) concluded here yesterday its voluntary medical campaign for children open-heart surgeries. The voluntary medical team conducted 66 operations, including 27 open-heart surgeries and 39 heart catheterization operations. This campaign is an extension of the relief and humanitarian work carried out by the Kingdom of Saudi Arabia, represented by the KSrelief, to alleviate the suffering of the needy people upon directives of the Custodian of the Two Holy Mosques and His Royal Highness the Crown Prince.