Submitted on: 29 March 2016.
Revised on: 30 June 2016.
Accepted on: 28 July 2016.
___________________JOURNAL OF THE EGYPTIAN PUBLIC HEALTH ASSOCIATION
Submitted on: 02 November 2007.
Revised on: 01 December 2007.
Accepted on: 04 January 2008.
___________________JOURNAL OF THE EGYPTIAN PUBLIC HEALTH ASSOCIATION
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Submitted on: 19 December 2024.
Revised on: 24 March 2025.
Accepted on: 23 April 2025.
___________________JOURNAL OF THE EGYPTIAN PUBLIC HEALTH ASSOCIATION