GAZA CITY Aid groups warned of surging numbers of malnourished children in war-ravaged Gaza as a trio of European powers prepared to hold an "emergency call" Friday on the deepening humanitarian crisis. Doctors Without Borders (MSF) said that a quarter of the young children and pregnant or breastfeeding mothers it had screened at its clinics last week were malnourished, a day after the United Nations said one in five children in Gaza City were suffering from malnutrition. With fears of mass