งานศึกษาวิจัย

https://www.dropbox.com/s/oj2qqbeglrgaey8/epidemiological_fulltext.pdf

https://www.dropbox.com/s/1xyvhh4o9lugck1/%E0%B8%A7%E0%B8%B4%E0%B8%88%E0%B8%B1%E0%B8%A2%20R2R%2053%20%E0%B8%89%E0%B8%9A%E0%B8%B1%E0%B8%9A%E0%B8%AA%E0%B8%A1%E0%B8%9A%E0%B8%B9%E0%B8%A3%E0%B8%93%E0%B9%8C