Department of Growth and Development;
Capital Institute of Pediatrics;
Beijing 100020;
China;
Department of Maternity and Child Heath Care;
Public Health School of Tongji Medical College University of Science and Technology;
Wuhan 430030;
Hubei;
China;
农村地区; 体格发育; 生长差异; 城市群; 郊区; 儿童; 中国; 社会经济;