Chen W, McLeod LD, Coles TM. Rasch first? Factor first? Poster presented at the 2014 ISPOR 17th Annual European Congress; November 2014. Amsterdam, The Netherlands.
Hollis K, Gilsenan A. Design and implementation of surveys to assess patient and health care provider understanding of risks and safe use conditions. In: Andrews EB, Moore M, editors. Mann's pharmacovigilance. 3rd ed. Hoboken: NJ. John Wiley & Sons; 2014.