论文数: 0 引用数: 0
h-index: 0
机构:
Sichuan Univ, West China Univ Hosp 2, Dept Obstet, Natl Off Maternal & Child Hlth Surveillance, Chengdu, Sichuan, Peoples R China Univ Manitoba, Max Rady Coll Med, Rady Fac Hlth Sci, Dept Community Hlth Sci, Winnipeg, MB R3E 0W3, Canada