Articles Copyright © The Author(s).
Owned by Hamadan University of Medical Sciences.
Published by UMSHA Press
Journal Tel: +9881 38380090
Publisher Tel: +988138381795
Website: http://jech.umsha.ac.ir
Email: jech[at]umsha.ac.ir
Articles Copyright © The Author(s).
Owned by Hamadan University of Medical Sciences.
Published by UMSHA Press
Journal Tel: +9881 38380090
Publisher Tel: +988138381795
Website: http://jech.umsha.ac.ir
Email: jech[at]umsha.ac.ir