1. Repchinsky C, Welbanks L, eds. CPS: Compendium of Pharmaceuticals and Specialties. Ottawa: Canadian Pharmacists Association, 2012:2906–2907.
2. Online Survey Response Rates and Times Background and Guidance for Industry Michael Braun Hamilton, Online Survey Analyst http://www.supersurvey.com/papers/supersurvey_white_paper_ response_rates.pdf.