Scientific Online Resource System

Scripta Scientifica Salutis Publicae

The PDF file you selected should load here if your Web browser has a PDF reader plug-in installed (for example, a recent version of Adobe Acrobat Reader).

If you would like more information about how to print, save, and work with PDFs, Highwire Press provides a helpful Frequently Asked Questions about PDFs.

Alternatively, you can download the PDF file directly to your computer, from where it can be opened using a PDF reader. To download the PDF, click the Download link above.

Fullscreen Fullscreen Off

Refbacks

About The Authors

Angel Dzhambov
Medical University - Plovdiv Faculty of Medicine
Bulgaria

Donka Dimitrova
Medical University-Plovdiv Faculty of Public health Dept. health management, health economics and primary care
Bulgaria

Mariana Aleksandrova
Medical University-Plovdiv Medical College

Font Size


|