Published on in Vol 16, No 4 (2014): April
1 School of Health Services Management, Anhui Medical University, Hefei, China
2 Lu’an Center for Diseases Prevention and Control, Lu'an, China
*these authors contributed equally
Published on in Vol 16, No 4 (2014): April
1 School of Health Services Management, Anhui Medical University, Hefei, China
2 Lu’an Center for Diseases Prevention and Control, Lu'an, China
*these authors contributed equally