Ingrid Wolfe, Matthew Thompson, Peter Gill, Giorgio Tamburlini, Mitch Blair, Ann van den Bruel, Jochen Ehrich, Massimo Pettoello-Mantovani, Staffan Janson, Marina Karanikolos, Martin McKee,
Health services for children in western Europe The Lancet. ,vol. 381, pp. 1224- 1234 ,(2013) ,
10.1016/S0140-6736(12)62085-6