Tsung-Hui Hu
Kaohsiung Chang Gung Memorial Hospital, and Chang Gung University College of Medicine, Kaohsiung city, Taiwan
Dih-Ling Luh a, b
a Department of Public Health, Chung Shan Medical University, Taiwan
b Department of Family and Community Medicine, Chung Shan Medical University Hospital, Taichung, Taiwan
Yo-Yu Tsao
Changhua Public Health Bureau, Changhua, Taiwan
Li-Sheng Chen
School of Oral Hygiene, College of Oral Medicine, Taipei Medical University, Taipei, Taiwan
Hsiu-Hsi Chen
Institute of Epidemiology and Preventive Medicine, National Taiwan University, Taipei, Taiwan
Yen-Po Yeh a, b, ⁎ 
a Changhua Public Health Bureau, Changhua, Taiwan
b Institute of Epidemiology and Preventive Medicine, National Taiwan University, Taipei, Taiwan
*Correspondence to: Changhua Public Health Bureau, No. 162, Sec. 2, Jhongshan Rd., Changhua City, Changhua County 500, Taiwan.Changhua Public Health BureauNo. 162, Sec. 2, Jhongshan RdChanghua CityChanghua County500Taiwan
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