Submitted on: 11 November 2018.
Revised on: 24 February 2019.
Accepted on: 12 March 2019.
___________________Epidemiologia & Prevenzione---INFERENZE SCARL
Submitted on: 29 October 2012.
Revised on: 19 November 2012.
Accepted on: 08 December 2012.
___________________Epidemiologia & Prevenzione---INFERENZE SCARL
Submitted on: 05 November 2011.
Revised on: 14 December 2011.
Accepted on: 30 January 2012.
___________________Epidemiologia & Prevenzione---INFERENZE SCARL
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Submitted on: 23 November 2019.
Revised on: 18 December 2019.
Accepted on: 15 February 2020.
___________________Epidemiologia & Prevenzione---INFERENZE SCARL
Submitted on: 24 June 2017.
Revised on: 16 September 2017.
Accepted on: 15 October 2017.
___________________Epidemiologia & Prevenzione---INFERENZE SCARL
Submitted on: 20 October 2002.
Revised on: 24 November 2002.
Accepted on: 23 December 2002.
___________________Epidemiologia & Prevenzione---INFERENZE SCARL