King Salman Humanitarian Aid and Relief Center (KSrelief) has concluded here yesterday its voluntary medical campaign for children open-heart surgeries in Mukalla, Hadhramaut Governorate. The center's volunteer medical team conducted 103 operations, including 23 open-heart surgeries and 80 heart catheterization operations. This campaign comes within the framework of the humanitarian aid provided by the Kingdom of Saudi Arabia, represented by the KSrelief, to the Yemeni people.