Article History
Received: 25 August 2017
Accepted: 29 January 2018
First Online: 5 March 2018
Change Date: 15 May 2018
Change Type: Correction
Change Details: The Publisher regrets an error in the original version of this article. In Section 5, under PADM (protective action decision model) classification, “Pre-decision stage” was erroneously listed twice.