Yang Fengling; Ding Huiwu; Man Gonglan; et al.The Shizhong District Service Station for Family Planning of Zaozhuang City in Shandong Province; Zaozhuang 277100;

• 山东省枣庄市市中区人口和计划生育服务站;山东省枣庄市薛城区人民医院;山东省枣庄市市立医院;山东省枣庄市市中区齐村镇计划生育服务站;277100;