Effect of gray model(1,1)on prediction of birth defects among the population of Guangxi Zhuang Autono⁃ mous Region 

PENG Zhenren, WEI Jie, HUANG Xiuning, SONG Pengshu, LIANG Lifang, HUANG Bohua, HE Jiajia, CHEN Biyan, QIU Xiaoxia, HE Sheng.
The Journal of Practical Medicine . 2022, (11): 1378 -1384 .  DOI: 10.3969/j.issn.1006⁃5725.2022.11.014